Title of Invention	"A PROCESS FOR THE PREPARATION OF AN EXTRACT OF THE PLANT EUPHORBIA PROSTRATA AND THE PHARMACEUTICAL COMPOSITIONS THEREOF"
Abstract	Novel compositions and a method for treating anorectal diseases including hemorrhoids and colonic diseases with long term effectiveness and a low prolapse rate are disclosed. The compositions can be orally administered as well as uniformly applied to the affected region. The composition comprise of flavonoidal and phenolic constituents extracted from the plant Euphorbia prostrata that possess anti-inflammatory, analgesic, haemostatic and wound-healing properties.

Title of Invention

"A PROCESS FOR THE PREPARATION OF AN EXTRACT OF THE PLANT EUPHORBIA PROSTRATA AND THE PHARMACEUTICAL COMPOSITIONS THEREOF"

Abstract

Novel compositions and a method for treating anorectal diseases including hemorrhoids and colonic diseases with long term effectiveness and a low prolapse rate are disclosed. The compositions can be orally administered as well as uniformly applied to the affected region. The composition comprise of flavonoidal and phenolic constituents extracted from the plant Euphorbia prostrata that possess anti-inflammatory, analgesic, haemostatic and wound-healing properties.

Full Text	FIELD OF THE INVENTION The invention relates to a novel compositions comprising of an extract of the plant Euphorbia prostrata useful for the treatment of anorectal disease including hemorrhoids and colonic diseases. The novel compositions possess properties to control inflammation, prevent capillary bleeding and fragility in mammalians, particularly human beings. BACKGROUND OF THE INVENTION Among the various anorectal and colonic diseases, hemorrhoids occupy a prominent position and have been the subject of numerous clinical studies. Hemorrhoidal disease is characterised by bleeding, without any pain. Fresh blood spots occur immediately, on defecation. However, pain occurs when the hemorrhoids are secondarily infected, or complicated by thrombosis and anal fissures. Hemorrhoids can be caused by a variety of factors including hormones, genes, inflammation, infection, constipation, exercise, vascular stasis, diet, strain, physical stance in defecation, loss of connective tissue elasticity with age etc. The symptoms most widely recognized are bleeding, pain and prolapse (Hyams and Philpot, 1970; Smith, 1987). These may be accompanied by thrombosis, pruritis, edema etc. Hemorrhoids can be treated through reduction of inflammation and pain, haemostasis, wound healing and protection of vascular walls. Thus, an effective treatment of acute hemorrhoidal attacks should not only provide relief as early as 2-3 days after initiation of the treatment, but also reduce the recurrence of such attacks. There exist several procedures for the treatment of hemorrhoids. WO8803398 patent application discloses surgical dressings for such treatment. Patents have been granted in respect of surgical devices such as European patent no. 0095142. U.S. Patent no. 4,621,635 has been granted for the use of lasers in the treatment of hemorrhoids. The techniques of cryopharmacotherapy and electrochemical techniques for treatment of hemorrhoids have also been patented vide European patent no. 0091405 and European patent no. 0116688, respectively. However, the biggest drawbacks of the above are the involvement of medical experts beyond mere prescription of medicines and probable hospitalization. Also, some of them are physically and/or psychologically unpleasant in application. Several patents (U.S. patent nos. 4,160,148, 4,508,728, 4,797,392, 4,518,583 and 5,234,914) have been granted in respect of compositions containing certain wound healing agents to provide symptomatic relief, by promoting tissue repair, reducing inflammation and encouraging wound healing. Some of them like U.S. patent nos. 4,518,583 and 5,234,914 contain antimicrobial agents. These compositions, however, only relieve symptoms associated with inflammation, like heat, itching, redness, pain and swelling. A number of compositions for the treatment of anorectal diseases (including hemorrhoids) are based on the anesthetic and vasoconstrictive properties of the constituents, but these provide only temporary symptomatic relief. Patents in the United States of America (U.S. patent nos. 4,613,498, 4,626,433, 5,166,132, 5,219,880, 5,234,914 and 4,797,392) and Europe (European patents nos. 0225832 and 0513442) have been granted in respect of compositions with varying constituents, for topical application in the form of suitable and acceptable pharmaceutical carriers, such as salts, ointments, etc., with organic, inorganic or biological active agents. However, these compositions provide only temporary relief and are limited to local application and cannot be used for systemic use or oral administration. A topical treatment for hemorrhoidal pain and for spasms of the sphincters and muscles located in the GI tract is disclosed in a granted patent (U.S. patent no. 5,595,753), which includes amino acid L-arginine in a pharmaceutically acceptable carrier. Another U.S. patent no. 5,591,436 has been granted for a composition for dietary supplement for the treatment of hemorrhoids. The composition comprises 60% to 95% Indian Barberry by weight; 4.8% to 38% Nagkesar by weight; and 0.2% to 2% Margosa tree leaves by weight. Another U.S. patent no. 5,562,906 discloses the use of bark or berries of the species Xanthoxylum clava herculis L and Xanthoxylum americanum Hill, both of the yellow wood tree family, are employed for the treatment of hemorrhoids and other membrane and capillary disorders of the veins and arteries. Improved strength and flexibility of the veins, arteries and their constituent structures is obtained. The flavonoidal constituents present in the extract of Euphorbia prostrata are reported to have anti-inflammatory properties. The phenolic compounds like ellagic and gallic acids and tannins are reported to have anti-inflammatory, haemostatic, gastro-protective and wound healing properties. Other plants containing flavonoids including apigenin glycosides and luteolin glycosides are Ixora arhorea (Rubiaceae), Bommervia hispida (Pteridaceae), Adenocalymma alliaceum (Bignomiaceae), Thalictrum thunbergii (Renunculaceae), Perilla frutescens (Labiateae), Chrysenthemum indicum, C. coronarium and Matricaria chamomilla (Compositae), Thymus membranaceous (Labiateae), Digitalis lanata (Scrophulariaceae), Cuminum cyminum and Petroselinum (Umbelliferae). Several species oiEuphorbia like Euphorbia minuta, Euphorbia microfolia, Euphorbia granulata (Euphorbiaceae) contain both apigenin and luteolin. Ellagic acid and other phenolic acids have been reported from different species of Euphorbia. The safety of various components of the Euphorbia extract has been reported in the literature. Some of the reports also claim anti-mutagenic/ anti-carcinogenic/ anti-genotoxic properties of the components of the Euphorbia extract. An Indian patent no. 186803 and several other patents (Australia, No. 698407; China, No. CN 1102387C; Europe, No. 868914; Russia, No. 2174396; South Africa, No. 97/2900; South Korea, No. 281679 and U.S., No. 5,858,371) have been granted to this applicant for a composition comprising a flavonoid containing extract of Euphorbia prostrata for treatment of anorectal and colonic diseases. The claimed extract comprises of very high contents of flavonoids (35 - 62% by weight), which is very expensive and time consuming to purify. Further, the presence of the phenolic compounds that are therapeutically useful for treatment of anorectal and colonic diseases due to their hemostatic and astringent properties, has not been established in the claimed extract. The presence of the phenolic compounds like ellagic acid, gallic acid and tannins comprising of these acids makes the claimed extract more effective for treatment of hemorrhoids and other colonic diseases, as the phenolic compounds are known gastroprotective agents. The antimicrobial properties of these phenolic compounds further prevent secondary infections often accompanied with hemorrhoids, fissures, fistulas etc. Furthermore, the process of extraction described in the said patent application comprises a step of treatment of the combined and concentrated extract with hot water and then taking the water-soluble portion for obtaining the tlavonoidal components. It was discovered in the present invention that the water- soluble portion contains substantial amount of phenolic compounds. The new method of the present invention comprises washing of the extract with hexane where only waxy materials and pigments are removed and there is no significant loss of phenolic compounds. The inventors have further researched, and have found that the novel flavonoid and phenolic compounds containing extract of Euphorbia prostrata disclosed in the present invention exhibits improved pharmacological response in comparison to existing compositions employing flavonoids either from Euphorbia or other sources. Further, the extraction procedure of the disclosed Euphorbia prostrata extract in the present invention is more cost effective and less time consuming in comparison to that of existing compositions employing flavonoids isolated from Euphorbia prostrata. The commercial implications of the improved and economic extraction procedure led the inventors to re-establish the pharmacological and toxicological validity of the new extract. The results were strikingly better than those of the equivalent flavonoid doses of the more purified extract of Euphorbia prostrata as disclosed earlier. The present invention provides a pharmaceutical composition that is safe and painless and has long-term effectiveness. OBJECTIVE OF THE INVENTION An objective of the present invention is to provide compositions for treating anorectal diseases including hemorrhoids and colonic diseases. Another objective for the present invention is to provide compositions for treating anorectal and colonic diseases including hemorrhoids comprising of an extract of the plant Euphorbia prostrata containing flavonoids and phenolic compounds, optionally with other therapeutic agent(s) and/or pharmaceutically acceptable carrier(s)/base(s). SUMMARY OF THE INVENTION A composition and a method for treating anorectal diseases including hemorrhoids and colonic diseases using an extract of Euphorbia prostrata with long-term effectiveness and low prolapse rates. The treatment includes administration by oral route an effective amount of composition comprising of a pharmaceutically acceptable carrier and mixture of flavonoids and phenolic compounds extracted from Euphorbia prostrata. The treatment also includes local application to the hemorrhoids and anorectal tissues, an effective amount of composition comprising of a pharmaceutically acceptable carrier and a mixture of flavonoids and phenolic compounds extracted from Euphorbia prostrata. STATEMENT OF INVENTION 1. Accordingly the present invention relates to a process for the preparation of an extract of the plant Euphorbia prostrata used in the preparation of a pharmaceutical composition for the treatment of anorectal or colonic disease such as hemorrhoids, fissures, cracks, fistulas, abscesses and inflammatory bowel disease comprising the extract from 0.1% to 99% by weight which comprises flavonoids and phenolic compounds, wherein the flavonoids are apigenin-7-glycoside, I - A% by weight; luteolin-7-glycoside, 0.3 - 2% by weight; and apigenin, luteolin and quercetin, 0.001 -0.3% by weight; and wherein the phenolic compounds are ellagic acid, 1-15% by weight; gallic acid, 1 - 12% by weight and tannins, 1 - 10%> by weight, with pharmaceutically acceptable carrier(s)/base(s) as herein described, optionally with additional therapeutic agent(s) as herein described, comprising of the following steps: a. drying the plant Euphorbia prostrata under controlled conditions of temperature and humidity, b. making a powder from the dried plant, c. extracting the dry course powder with a polar solvent repetitively to form an extract, d. distilling the extract, e. washing the concentrated extract with a non-polar organic solvent, f optionally re-extracting the washed polar extract in a medium polarity organic solvent, distilling the extract followed by dehydrating the extract, and g. drying the extract to produce the desired pharmaceutically acceptable extract capable of being used alongwith pharmaceutically acceptable carrier(s)/base(s). DETAILED DESCRIPTION OF THE INVENTION The present invention provides compositions that can be orally administered as well as uniformly applied to the affected region. It reduces inflammation, and soothes the feeling of itching and burning associated with it. The invention provides relief from pain associated with hemorrhoids. The invention also significantly reduces bleeding and accelerates tissue re-growth in the affected hemorrhoidal tissue. The invention is useful in the treatment of lesions, other than hemorrhoids in the anorectal area and can be formulated in several types of dosage forms. There are no side effects from the use of the composition in human beings. Further, the treatment is not physically or psychologically unpleasant in its administration and/or application. The plant Euphorbia prostrata (Family: Euphorbiaceae) was identified as being relevant in the study of anorectal and colonic diseases, including hemorrhoids. Euphorbia prostrata is well known to the Indian traditional medicine in the use of treatment for asthma, bloody dysentery and sores. Previously, five new compounds were discovered and identified by the inventors in Euphorbia prostrata namely luteolin, 6-methoxy-quercetin-glycoside, Quercetin, and glycosides of luteolin and apigenin. Now two more phenolic compounds, namely ellagic acid and gallic acid were identified in the extract prepared in a different manner, which were found to be of additional therapeutic value for treatment of hemorrhoids. The compounds of the present invention are standardized to pharmaceutically acceptable specifications in order to ensure reproducibility from batch to batch. The result is the extract of Euphorbia prostrata, which is the main active agent in the improved anorectal composition. Another unique feature of this extract of Euphorbia prostrata is that it is prepared in such a manner that the resulting composition is easily dispersible in water due to presence of many hydrophilic compounds besides flavonoids. The pharmaceutical composition comprising of the extract of Euphorbia prostrata as the active ingredient contains flavonoids and phenolic compounds, out of which apigenin-7-glycoside is about 1 - 4% by weight of the extract, luteolin-7-glycoside is about 0.3 - 2% by weight of the extract, and apigenin, luteolin and quercetin are about 0.001 - 0.3% by weight of the extract. The extract also contains 1 - 10% by weight of tannins, 1-15% by weight of ellagic acid, and 1 - 12% by weight of gallic acid. In an embodiment of the present invention. Euphorbia prostrata was found to be devoid of any toxic diterpene content like phorbol or ingenol esters, unlike many other species of Euphorbia. The pharmaceutical compositions of the present invention may also contain additional therapeutic agents from other plants and/or from different pharmacological groups such as anesthetics, vasoconstrictors, protectants, counterirritants, astringents, wound healing agents, antimicrobials, keratolytics, anticholinergics or their pharmaceutically acceptable salts, used either alone or in combinations thereof. Preferably, it would be beneficial to include other wound healing and antimicrobial agents, which will result in the improvement of the effectiveness of the composition. The anesthetics include but are not limited to benzocaine, diperodon, pramoxine, camphor, dibucaine, phenol, tetrtacaine, lignocaine and phenacaine, used either alone or in combinations thereof. The amount of such anesthetics could vary between 0.25% and 25% by weight. The vasoconstrictors include but are not limited to ephedrine and phenylephrine, used either alone or in combinations thereof. The amount of such vasoconstrictors may vary between 0.005% and 1.5% by weight. The protectants include but are not limited to aluminum hydroxide gel, calamine, cocoa butter, cod or shark liver oil, glycerin in aqueous solution, kaolin, lanolin, mineral oil, starch, white petrolatum, wool alcohol, zinc oxide, vegetable or castor oil, polyethylene glycol and propylene glycol, used either alone or in combinations thereof. The amount of such protectants may vary between 5.0% and 88.0% by weight. The counterirritant includes but is not limited to menthol in aqueous solution. The amount of such counterirritant may vary between 0.25 - 2.5% by weight. The astringents include but are not limited to calamine, zinc oxide, hamamelis water, bismuthresorcinol compound, bismuth subgallate, Peruvian balsam, aluminium chlorhydroxy allantoinate, tannic acid and tannins, used either alone or in combinations thereof The amount of such astringents may vary between 0.2% and 60.0%) by weight. The tannins additionally may be derived from plants such as Butea monosperma, Butea parviflora and Butea frondoza (Family: Leguminosae). The wound healing agents include but are not limited to vitamin A and vitamin D in an amount of between 0.005% and 0.04% by weight. Also Peruvian balsam can be included by weight in an amount of between 0.5%) and 2.5% by weight. Also cod liver oil can be included in an amount between 1.0% and 6.0% by weight. The antimicrobial agents include but are not limited to benzethonium chloride, benzalkonium chloride, boric acid, 8-quinolinol benzoate, secondary amyltricresols, cetylpyridinium chloride, phenol, menthol, chlorothymol, camphor and 8-hydroxyquinoline sulfate, used either alone or in combinations thereof. The amount of such antimicrobial agents may vary between 0.02% and 40.0%) by weight. The keratolytics include but are not limited to aluminium chlorhydroxy allantoinate and resorcinol, used either alone or in combinations thereof The amount of such keratolytics may vary between 0.2% and 3.5% by weight. The anticholinergics include but are not limited to atropine or other solanaceous type alkaloids, used either alone or in combination thereof. The amount of such anticholinergics may vary between 0.02% and 0.1% by weight. The pharmaceutical compositions of the present invention can be prepared by dissolving or dispersing the extract in appropriate base(s)/carrier(s). The pharmaceutical composition into different dosage forms can be formulated using conventional excipients and techniques known to art. Pharmaceutical dosage bases or carriers used in the present invention can be capsules (hard or soft), tablets (coated or uncoated), ointments, creams, gels, foams, solutions, suspensions, medicated pad, bandage, powder, aerosols, sprays, film, flakes, modified release dosage forms (sustained release, controlled release, delayed release, prolonged release, timed release, and the like) sublingual dosage forms, wafers, caplets, parenteral dosage forms to be infiltered at the site of the injection, and the like. The capsules comprise of 25-300 mg of the extract of Euphorbia prostrata, preferably 50-100 mg along with pharmaceutical excipients. Similarly, tablets may be prepared by dispersing 25-300 mg of the extract of Euphorbia prostrata, preferably 50-100 mg in a suitable carrier, optionally along with other pharmaceutical excipients. The tablets may be coated or uncoated. The cream or ointment may contain 0.1 - 10% w/w, preferably 0.2 - 5% w/w of the extract of Euphorbia prostrata. In an embodiment of the present invention, the capsule may be taken, subject to a maximum of 300 mg of extract per day, along with topical application containing the same extract, as and when required. The granules in ready dispersible and effervescent form may be prepared by using excipients such as sucrose, mannitol, sodium bicarbonate, citric acid, and the like. The cream may be prepared by emulsifying the aqueous phase, containing 0.1 - 10% w/w preferably 0.2 - 5% w/w of the extract, along with a suitable oleaginous phase. Other alternatives can be prepared by formulating the extract in 0.1 -10% w/w as Hydrophilic ointment USP with absorption bases; or water soluble bases such as Polyethylene glycol ointment USNF; or as water absorbing bases such as Hydrophilic petrolatum USP, Lanolin USP; or in hydrocarbon bases such as White petrolatum USP. The suppository compositions may contain either hydrophobic or hydrophilic base and includes cocoa butter, glycerinated gelatin, hydrogenated vegetable oils, mixtures of polyethylene glycols of various molecular weights, polyoxyethylene sorbitan fatty acid esters and polyethylene stearates, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, chemically modified starch or a combination of these materials. The foam and spray bases may contain one or more of aqueous and nonaqueous solvents, propellants, surfactants, suspending agents and stabilizing agents. The medicated pads may contain one or more of the following: Water, glycerin, propylene glycol, alcohol and Hamamelis water. EVALUATION OF PHARMACOLOGICAL ACTIVITY OF THE EXTRACT Antihaemorrhoidal activity The antihaemorrhoidal activity of the Euphorbia prostrata extract was assessed and compared with reference drug, diosmin using anorectal : body weight ratio model in rats (modified method of Jia et al., 2000). Euphorbia prostrata extract (5, 10, 20 and 40 mg/kg, p.o., 7 days) showed significant decrease in anorectal : bodyweight ratio as well as inflammation and redness at the site when compared to control (carrageenan - treated group). Diosmin (50 mg/kg, p.o., 7 days) also significantly decreased anorectal : body weight ratio in rats. Further, individual components of Euphorbia prostrata extract i.e. apigenin-7- glucoside (0.478 mg/kg, p.o.), ellagic acid (1.204 mg/kg, p.o.), and gallic acid (1.123 mg/kg, p.o.) on chronic administration (7 days) also showed effect. In histopathological examination of the anorectum, normal animals administered per orally with 0.5% CMC alone showed intact mucosal layer with prominent mucosal cells and mild leukocyte migration, where as carrageenan - treated animals showed uneven thick mucosal layer with disrupted mucosal cells and severe leukocyte migration suggesting the presence of a significant inflammation. Further, both Euphorbia prostrata extract (10 mg/kg, p.o., 7 days) and diosmin (50mg/kg, p.o., 7 days) showed intact mucosal layer with prominent mucosal cells and mild leukocyte migration. Anti-inflammatory activity Carrageenan - induced paw edema in rats Carrageenan (1% w/v) produced paw edema (Winter et al., 1962) in control group, indicating inflammatory response. Euphorbia prostrata extract (5, 10, 20, and 40 mg/kg, p.o.) dose dependently and significantly decreased carrageenan-induced increase in paw volume as compared to control rats (EDso 15.42 - 15.84 mg/kg, p.o.) The onset of anti-inflammatory effect was rapid and lasted up to 4 hrs after carrageenan injection. The anti-inflammatory effect of Euphorbia prostrata extract at doses 20 and 40 mg/kg was comparable to that of nimesulide (2 mg/kg, p.o.), a preferential cyclooxygenase - 2 (COX - 2) inhibiting NSAID. Further, solution of Euphorbia prostrata extract (0.5- 4.0 % equivalent to I - 8 mg/kg, applied topically on paw) significantly decreased the carrageenan - induced increase in paw volume. The topical anti-inflammatory effect of Euphorbia prostrata extract (1%) was comparable to that of nimesulide (2%) at 60 min in rats. Antinociceptive activity Acetic acid- induced writhing in mice (Koster et al., 1959) Euphorbia prostrata extract (2 mg/kg, p.o.) exhibited maximum antinociceptive effect after 90 minutes of its administration in time response study. This effect lasted up to 2 hrs of its administration. Nimesulide (2 mg/kg), a reference drug also significantly increased the pain threshold in mice. Euphorbia prostrata extract (I, 2, 5, and 10 mg/kg, p.o.) produced dose -dependent antinociceptive effect in mice. Apigenin -7- glucoside (0.5, 1.0, and 2.0 mg/kg, p.o.) and luteolin glucoside (0.25, 0.5, and 1.0 mg/kg, p.o.) also exhibited dose-dependent antinociceptive effect in writhing test. Carrageenan — induced hyperalgesia in rats Carrageenan (1% w/v) significantly decreased paw withdrawal latency in paw pressure test (Randall and Selitto, 1957). Euphorbia prostrata extract (10, 20, and 40 mg/kg, p.o.) significantly increased paw withdrawal latency as compared to carrageenan - treated rats. Nimesulide (2 mg/kg), a reference drug also increased paw withdrawal latencies in rats. Carrageenan - induced pleurisy in rats Pleurisy was induced with carrageenan using a method reported by Engelhard et al., 1995. A single-dose administration of Euphorbia prostrata extract (20 and 40 mg/kg, p.o.) produced significant inhibition of exudates formation and migration of polymorphonuclear leukocytes and monocytes in carrageenan-induced pleurisy. Superoxide radical scavenging activity Euphorbia prostrata extract (25 µg) exhibited a superior superoxide radical scavenging activity of 38.70% in comparison to tocopherol (25µg), which showed a similar activity of 25.54%. Wound healing activity in rats The wounds were developed by skin excision method in rats as described by Vishnu Rao et al., 1996. Euphorbia prostrata extract cream (1.75%) showed significant wound healing activity in comparison to placebo cream on Day 4, 8, and 12 in wound excision model in rats. Haemostatic activity Euphorbia prostrata extract (1%, 2%, and 4% solution) significantly reduced the bleeding time as compared to control group (distilled water). Moreover, the reduction in bleeding time with 4% solution of Euphorbia prostrata extract was comparable to 2.5% solution of alginic acid. MECHANISM OF ANTI-HEMORRHOIDAL ACTIVITY OF THE EXTRACT: Euphorbia prostrata extract mainly comprises of flavonoids (apigenin -7- glucoside, luteolin -7 -glucoside), ellagic acid, gallic acid, and tannins. Phenolic compounds are widespread in the plant kingdom. The major groups of phenolic compounds are flavonoids and phenolic acids. They are one of the main constituents of several medicinal plants that have been used as folk medicine throughout the world. Interest has recently been focused on flavonoids and flavanoids because of their broad pharmacological activities. These flavonoids are well reported for analgesic, anti-Inflammatory, antioxidant, antiangiogenic, anti-allergic, antiviral and antimutagenic activity (Lin et al., 2001; Formica and Regelson, 1995; Fotsis et al., 1997; Wang et al., 1998; Block et al., 1998). It is reported that apigenin is a most potent inhibitor of transcriptional activation of both COX-2 and iNOS enzyme in lipopolysaccharide activated RAW 264.7 macrophages. It is further suggested that suppression of transcriptional activation of COX-2 and iNOS by apigenin might mainly be mediated through inhibition of IKB (inhibitor of KB). Such type of modulation of COX-2 and iNOS by apigenin may be important in the prevention of carcinogenesis and inflammation (Liang et al., 1999). Further, it is also suggested that antioxidant properties of apigenin -7 - glucoside contribute to its anti¬inflammatory activity in various animal models (Fuchs and Milbradt, 1993). Delia Loggia et al, 1986 also reported that apigenin -7-glucoside and luteolin -7 -galactoside shows a dose dependent inhibition of the oedematous response to croton oil. In CCl4 - induced peroxidation, apigenin and luteolin had shown significant antiperoxidative activity in rat liver microsomes (Cholbi et al., 1991). Xagorari et al., 2001 reported that luteolin inhibits protein tyrosin phosphorylation, nuclear factor- ΚB mediated gene expression and pro-inflammatory cytokine production in murine macrophages. Ellagic acid is one of the major constituents of Euphorbiaprostrata extract also reported to suppress histamine release mediated by histamine liberators (compound 48/80, dextran and polymyxin B sulfate) in vivo (Bhargava and Westfall, 1969). Moreover, the anti-inflammatory effects of flavonoids comprise inhibition of histamine release, modulation of the prostanoids metabolism and antioxidant properties. It is speculated that analgesic, anti-inflammatory and antioxidant activity of various flavonoid components of Euphorbia prostrata extract (apigenin-7- glucoside, luteolin -7 -glucoside) and ellagic acid and/or gallic acid may contribute in healing of inflammatory tissue damage in hemorrhoidal conditions. Phenolic acids are reported to activate intrinsic blood coagulation by activation of Hageman factor and cause a state of hypercoagulability. Although the hypercoagulable state persists for as long as 4 hours after i.v. administration, no thrombotic phenomena has been reported (Girolami and Cliffton, 1967). Vegetable tannins are water-soluble phenolic compounds including both hydrolysable and condensed tannins that are present in every food plant. Hydrolysable tannins contain either gallotannins or ellagiotannins that yield gallic acid or ellagic acid respectively on hydrolysis. It is well reported that tannic acid has antimicrobial properties, which is associated with the ester linkage between gallic acid and other sugar or alcohol groups (Chung et al, 1993; 1995). From the anti-hemorrhoidal studies conducted in animals, it is evident that the Euphorbia prostrata extract has better efficacy than the purified flavonoids or other constituents alone. The various studies conducted on Euphorbia prostrata extract are listed below in Figures 1-9. Figure 1: Effect of Euphorbia prostrata extract (14395) against carrageenan-induced hemorrhoids in rats. Figure 2: Effect of individual component of Euphorbia prostrata extract (14395) against carrageenan-induced hemorrhoids in rats. Figure 3: Effect of Euphorbia prostrata extract (14395) against carrageenan-induced paw oedema (oral). Figure 4: Effect of Euphorbia prostrata extract (14395) against carrageenan-induced paw oedema (topical). Figure 5: Effect of Euphorbia prostrata extract (14395) against acetic acid-induced chemonociception in mice Figure 6: Effect of principal components of Euphorbia prostrata extract (14395) against acetic acid-induced chemonociception in mice. Figure 7: Effect of Euphorbia prostrata extract (14395) against carageenan-induced hyperalgesia in rats. Figure 8: Effect of Euphorbia prostrata extract (14395) on bleeding time in liver incision model. Figure 9: In vitro superoxide radical scavenging activity of Euphorbia prostrata extract (14395). SAFETY STUDIES Effect on central nervous system The effect of Euphorbia prostrata extract on the central nervous system were assessed from acute studies of effect on the appearance and gross behavior of rats and mice, the performance of mice on a rotating rod, open field behavior in rats, locomotor activity in mice using actophotometer, rectal temperature in rats, forced swimming despair behavior in mice, pentobarbitone-induced sleeping time in mice. Behaviorally, Euphorbia prostrata extract was well tolerated by both mice and rats (up to 2000 mg/kg, p.o.) following single oral administration and following multiple dose oral administration (up to 130 mg/kg in mice for 28 days and up to 90 mg/kg in rats for 28 days). In diazepam-controlled mouse studies. Euphorbia prostrata extract did not (a) alter gross behavior; (b) impair motor co-ordination (rotarod test); (c) impair motor activity using actophotometer after oral administration at doses 100, 200 and 400 mg/kg. In chlorpromazine-controlled rat study. Euphorbia prostrata extract did not alter rectal temperature at doses 100, 200, and 400 mg/kg. In imipramine-controlled mouse study, Euphorbia prostrata extract at doses 100, 200, and 400 mg/kg did not alter forced swimming despair behavior after single oral administration. Furthermore, Euphorbia prostrata extract did not interact with pentobarbitone-induced sleeping time at doses 100, 200, and 400 mg/kg in mice. In diazepam-controlled rat study. Euphorbia prostrata extract did not impair open field behavior (ambulatory and rearing behavior) at doses 100, 200, and 400 mg/kg. Effect on cardiovascular system Euphorbia prostrata extract did not cause any change in normal ECG, blood pressure, and heart rate in rats following single oral administration up to 400 mg/kg and following multiple dose oral administration (up to 90 mg/kg in rats for 28 days). Effect of on respiratory system Euphorbia prostrata extract did not alter basal insufflation pressure of trachea after 7 days administration of 400 mg/kg, p.o. of Euphorbia prostrata extract in guinea pig. Effect on gastrointestinal system Euphorbia prostrata extract did not alter basal acid secretion and gastrointestinal integrity upon single administration up to 400 mg/kg, p. o. in rats. In mice, there was no alteration in gut motility up to 400 mg/kg, p.o. of Euphorbia prostrata extract after 1 h of single dose oral administration. TOXICOLOGICAL STUDIES Single dose toxicity: No mortality was observed when Euphorbia prostrata extract was administered up to 2000 mg/kg, p.o. in rats and mice. Repeat dose toxicity: Mice: Repeated administration (32.50 mg/kg, 65.0 mg/kg and 130.0 mg/kg, p.o.) of Euphorbia prostrata extract for 28 days to mice did not exhibit mortality (NOEL 130 mg/kg, p.o. in mice). Rats: Repeated administration (22.50 mg/kg, 45.0 mg/kg and 90.0 mg/kg, p.o.) of Euphorbia prostrata extract for 28 days to rats did not exhibit mortality (NOEL 90 mg/kg, p.o.). In another study, repeated administration of Euphorbia prostrata extract 428 mg/kg, p.o., for 14 days did not produce significant alterations in body weight, organ weights, biochemical, and histopathological changes in comparison to control animals. Guinea pig: Repeated administration of Euphorbia prostrata extract up to 300 mg/kg to guinea pig for 14 days did not produce significant alterations in body weight, organ weights, biochemical, and histopathological changes in comparison to control animals. Examples are provided below to illustrate the aspects of the present invention. However, they do not intend to limit the scope of the present invention. EXAMPLES General process of manufacture of the Extract: Qualified professionals collected the plant Euphorbia prostrata from various parts of India. The plant was identified and characterized according to WHO guidelines (WHO/TRM/91.4, Programme Traditional Medicines World Health Organization Geneva, 1991) and was dried under controlled conditions of temperature and humidity. The whole plant was ground to coarse powder. The coarse powder was extracted using a polar solvent like an alkanol or acetone with or without water. The extract was concentrated and washed with a non-polar solvent like a hydrocarbon or chlorinated hydrocarbon. The washed extract was optionally further extracted into a medium polar solvent like ethyl acetate or ethyl methyl ketone. The final extract was optionally dehydrated with a suitable dehydrating agent and dried, either in a tray drier or in a spray drier, milled to a powder form, sifted to the desired particle size and packed in a suitable container to protect from moisture. EXAMPLE 1 The powdered drug (500 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 3000 It. of 80% aqueous methanol at about 60°C. The process was repeated 5 times till the drug was exhausted. The aqueous-methanolic extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of hexane to remove the wax and fatty material. The washed extract was dried completely for several hours at 60°C under vacuum. The final extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture. EXAMPLE 2 The powdered drug (700 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 4500 It. of methanol at about 60°C. The process was repeated 5 times till the drug was exhausted. The methanolic extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of dichloromethane to remove the wax and fatty material. The washed extract was dried completely for several hours at 60°C under vacuum. The final extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture. EXAMPLE 3 The powdered drug (350 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 3000 It. of 80% aqueous acetone at about 50°C. The process was repeated 5 times till the drug was exhausted. The aqueous-acetone extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of hexane to remove the wax and fatty material. The washed extract was dried completely for several hours at 60°C under vacuum. The tlnal extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture. EXAMPLE 4 The powdered drug (500 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 3000 It. of 80% aqueous methanol at about 60°C. The process was repeated 5 times till the drug was exhausted. The aqueous-methanolic extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of hexane to remove the wax and fatty material. The washed extract was again extracted with ethyl acetate. The ethyl acetate extract was dehydrated with anhydrous sodium sulphate and concentrated by distillation. The concentrated extract was dried completely for several hours at 60°C under vacuum. The final purified extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture. Process of evaluation of the Extract The extract of Euphorbia prostrata of the above-mentioned examples was characterised by High Performance Liquid Chromatography (HPLC). The HPLC was performed under following conditions and using Waters system equipped with M510 pumps and data station with Millenium software. Mobile phase: A linear gradient of Mobile Phase A (2% acetic acid in Water) and Mobile Phase B (2% acetic acid in Acetonitrile) according to the following table: (Table Removed) Column: C18 (250X4.6 mm/5 !) Flow Rate: 1 ml/min Detector: UV absorbance at 335 nm The HPLC chromatogram showed a number of peaks, the major ones corresponding to galHc acid, ellagic acid, luteolin glucoside and apigenin glucoside. The two peaks corresponding to the flavonoid components luteolin glucoside and apigenin glucoside were used as the chemical and pharmacological marker for quantitation of the product. A sum of the two peaks was calculated corresponding to standard apigenin glucoside and the measure was expressed as the Total Flavonoids. CAPSULE COMPOSITIONS EXAMPLE 5 Ingredient mg/capsule Purified euphorbia extract 100,0 Microcrystalline cellulose 200.8 Mannitol 72.0 Talc 3.2 Sodium starch glycollate 12.0 Colloidal silicon dioxide 12.0 Procedure: 1) Extract, microcrystalline cellulose and mannitol are sifted and mixed together. 2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together. 3) The materials of step 1 and 2 are mixed. 4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%. 5) The filled capsules are packed in air-tight packages. EXAMPLE 6 Ingredient mg/capsule Purified euphorbia extract 100.0 Microcrystalline cellulose 150.0 Mannitol 65.0 Lactose 50.0 Talc 3.0 Sodium starch glycollate 17.0 Colloidal silicon dioxide 15.0 Procedure: 1) Extract, microcrystalline cellulose, lactose and mannitol are sifted and mixed together. 2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together. 3) The materials of step 1 and 2 are mixed. 4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%. 5) The filled capsules are packed in air-tight packages. EXAMPLE 7 Ingredient mg/capsule Purified euphorbia extract 100.0 Microcrystalline cellulose 50.0 Mannitol 65.0 Lactose 150.0 Talc 3.0 Sodium starch glycollate 17.0 Colloidal silicon dioxide 15.0 Procedure: 1) Extract, microcrystalline cellulose, lactose and mannitol are sifted and mixed together. 2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together. 3) The materials of step 1 and 2 are mixed. 4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of 400 mg ± 2%. 5) The filled capsules are packed in air-tight packages. EXAMPLE 8 Ingredient mg/capsule Purified euphorbia extract 100.0 Microcrystalline cellulose 175.0 Mannitol 80.0 Talc 5.0 Sodium starch glycollate 15.0 Colloidal silicon dioxide 25.0 Procedure: 1) Extract, microcrystalline cellulose and mannitol are sifted and mixed together. 2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together. 3) The materials of step 1 and 2 are mixed. 4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%. 5) The filled capsules are packed in air-tight packages. EXAMPLE 9 Ingredient mg/capsule Purified euphorbia extract 100.0 Microcrystalline cellulose 135.0 Starch 25.0 Dibasic calcium phosphate 110.0 Talc 2.0 Magnesium stearate 3.0 Sodium starch glycollate 10.0 Colloidal silicon dioxide 15.0 Procedure: 1) Extract, microcrystalline cellulose, starch and dibasic calcium phosphate are sifted and mixed well. 2) Talc, magnesium stearate, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together. 3) The materials of step 1 and 2 are mixed. 4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of 400 mg ± 2%. 5) The filled capsules are packed in air-tight packages. EXAMPLE 10 Ingredient mg/capsule Purified euphorbia extract 100.0 Microcrystalline cellulose 90.0 Lactose 50.0 Starch 122.0 Talc 3.0 Magnesium stearate 3.0 Croscarmellose sodium 12.0 Colloidal silicon dioxide 20.0 Procedure: 1) Extract, microcrystalline cellulose, lactose & starch are sifted and mixed together. 2) Talc, magnesium stearate, croscarmellose sodium and colloidal silicon dioxide are passed through fine sieves individually and then mixed together. 3) The materials of step 1 and 2 are mixed. 4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of 400 mg ± 2%. 5) The filled capsules are packed in air-tight packages. EXAMPLE 11 Ingredient mg/capsule Purified euphorbia extract 100.0 Mannitol 176.0 Starch 100.0 Talc 2.0 Croscarmellose sodium 5.0 Sodium starch glycollate 12.0 Sodium stearyi fumarate 5.0 Procedure: 1) Extract, mannitol and starch are sifted and mixed together. 2) Talc, croscarmellose sodium, sodium starch glycollate and sodium stearyi furmate are passed through fine sieves individually and then mixed together. 3) The materials of step 1 and 2 are mixed. 4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%. 5) The filled capsules are packed in air-tight packages. TABLET COMPOSITIONS EXAMPLE 12 (Uncoated tablet) Ingredient mg/tablet Purified euphorbia extract 100.0 Microcrystalline cellulose 120.0 Mannitol 80.0 Croscarmellose sodium 10.0 Lactose 66.0 Talc 4.0 Colloidal silicon dioxide 10.0 Croscarmellose sodium 10.0 Procedure: 1) Extract, microcrystalline cellulose, mannitol, croscarmellose sodium and lactose are sifted and mixed together. 2) The material of step 1 is compacted. 3) The compacts of step 2 are passed through sieve and mixed. 4) Talc, colloidal silicon dioxide and croscarmellose sodium are passed through fine sieve and mixed together. 5) The material of step 3 is mixed with material of step 4. 6) The material of step 5 is compressed into tablets at an average weight of 400 mg ± 2%. 7) The tablets are packed in air-tight packages. EXAMPLE 13 (Film-coated tablet) Ingredient mg/tablet Core tablet composition Purified euphorbia extract 100.0 Microcrystalline cellulose 120.0 Mannitol 80.0 Croscarmellose sodium 10.0 Lactose 66.0 Talc 4.0 Colloidal silicon dioxide 10.0 Croscarmellose sodium 10.0 Film coating composition Hydroxypropyl methylcellulose (E-15) 12.0 Polyethylene glycol 400 (PEG 400) 2.4 Iron oxide red 0.75 Iron oxide yellow 0.50 Titanium dioxide 0.25 Isopropyl alcohol q.s. (lost in processing) Dichloromethane q.s. (lost in processing) Procedure: 1) Extract, microcrystalline cellulose, mannitol, croscarmellose sodium and lactose are sifted and mixed together. 2) The material of step 1 is compacted. 3) The compacts of step 2 are passed through sieve and mixed. 4) Talc, colloidal silicon dioxide and croscarmellose sodium are passed through fine sieve and mixed together. 5) The material of step 3 is mixed with material of step 4. 6) The material of step 5 is compressed into tablets at an average weight of 400 mg ± 2%. 7) Hydroxypropyl methylcellulose is dispersed in a mixture of isopropyl alcohol and dichloromethane with continuous mixing in homogenizer. 8) PEG 400 is added to the above solution of step 7 and mixed. 9) Iron oxide red, iron oxide yellow and titanium dioxide are passed through fine sieve and mixed. 10) The material of step 9 is added to material of step 8 and mixed for 30 minutes. 11) The core tablets are charged into the coating pan and coated with the coating solution of step 10 till an average tablet weight gain of ~3% is achieved. 12) The tablets are dried and packed in air-tight packages. CREAM COMPOSITIONS EXAMPLE 14 Ingredient mg/gm Purified euphorbia extract 10.0 Propylene glycol 50.0 Titanium dioxide 10.0 Stearic acid 130.0 Cetyl alcohol 10.0 Isopropyl myristate 60.0 Sorbitan stearate 20.0 Methyl paraben 1.5 Propyl paraben 0.3 Com oil 50.0 Glycerin 50.0 Sorbitol solution 30.0 VeegumHV 10.0 Sodium CMC 3.0 Tween 80 15.0 Purified water 9.8 Procedure: 1) Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; the mixture heated to 55-60°C; titanium dioxide is added to it and stirred well. 2) Stearic acid, cetyl alcohol, isopropyl myristate, sorbitan stearate, and corn oil are heated to 70°-75°C. 3) In another vessel, sorbitol solution and Tween 80 are taken. 4) Veegum HV is separately hydrated in the water. 5) Sodium carboxymethyl cellulose (sodium CMC) is separately hydrated in glycerin. 6) The material of step 4 and step 5 are added to the material of step 3 and heated to 70°-75°C. 7) The material of step 2 and step 6 are mixed and cooled. 8) When the material of step 7 attains a temperature of 50°-55°C, the material of step 1 is added to it. 9) The mixture is allowed to cool to room temperature to obtain the cream. EXAMPLE 15 Ingredient mg/gm Purified euphorbia extract 10.0 Propylene glycol 50.0 Titanium dioxide 10.0 Hard paraffin 60.0 Liquid paraffin 10.0 Isopropyl myristate 30.0 Span 60 20.0 Methyl paraben 1.5 Propyl paraben 0.3 Corn Oil 20.0 Glycerin 80.0 Sorbitol solution 50.0 Veegum HV 20.0 Tween 80 15.0 Purified water 9.8 Procedure: 1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; the mixture heated to 55-60°C; titanium dioxide is added to it and stirred well. 2. Hard paraffin, liquid paraffin, isopropyl myristate, Span 60, and Corn Oil are heated to 70°-75°C. 3. Veegum HV is hydrated in purified water; glycerin, Tween 80, and sorbitol is added to it; and the mixture is heated to 70°-75°C. 4. The material of step 2 is added to the material of step 3 with stirring and the mixture is allowed to cool to 55°-60°C. 5. The material of step 1 is added to the material of step 4, stirred, and allowed to cool to room temperature to obtain the cream. EXAMPLE 16 Ingredient mg/gm Purified euphorbia extract 10.0 Propylene glycol 50.0 Titanium dioxide 10.0 Glyceryl monostearate 90.0 Hydrogenated lanolin 30.0 Com oil 40.0 Simethicone 1.5 Span 60 20.0 Purified water 9.8 Hydroxyethyl cellulose 20.0 Glycerin 50.0 Sorbitol 30.0 Sodium CMC 1.5 Propyl paraben 0.3 Methyl paraben 1.5 Tween 80 15.0 Purified water 9.8 Procedure: 1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; titanium dioxide is added to it and stirred well. 2. Glyceryl monostearate, hydrogenated lanolin, corn oil, simethicane, and Span 60 are taken. 3. In cool purified water, hydroxyethyl cellulose is dissolved; sorbitol and Tween 80 is added to it and the mixture is heated to 70-75°C. 4. Separately sodium carboxymethyl cellulose (sodium CMC) is dispersed in glycerin and added to the material of step 3. 5. The material of step 2 is added to the material of step 3 and allowed to cool with stirring. 6. When a temperature of 50-55°C is attained, the material of step 1 is added, stirred, and allowed to cool to room temperature to obtain the cream. EXAMPLE 17 Ingredient mg/gm Purified euphorbia extract 10.0 Beeswax 50.0 Liquid paraffin 60.0 Com oil 25.0 Stearic acid 110.0 Cetyl alcohol 10.0 Titanium dioxide 10.0 Propylene glycol 50.0 Methyl paraben 1.5 Propyl paraben 0.3 Glycerin 50.0 Sorbitol Solution 30.0 Tween80 15.0 Purified water 9.8 Procedure: 1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; titanium dioxide is added to it and stirred well. 2. Beeswax, liquid paraffin, corn oil, stearic acid and cetyl alcohol are heated to 70-75°C. 3. Glycerin, sorbitol and Tween 80 is added to purified water and heated to 70°-75°C. 4. The material of step 2 is added to the material of step 3 and stirred. 5. The material of step 1 is added to the material of step 4 and allowed to cool to room temperature to obtain the cream. EXAMPLE 18 Ingredient mg/gm Purified euphorbia extract 10.0 Propylene glycol 50.0 Titanium dioxide 10.0 Stearic acid 70.0 Simethicone 1.0 Glyceryl monostearate 60.0 Cetosteryl alcohol 20.0 Cetyl alcohol 10.0 Sorbitan stearate 20.0 Methyl paraben 1.5 Propyl paraben 0.3 Glycerin 50.0 Sorbitol 30.0 Tween 80 15.0 Xanthangum 10.0 Purified water 9.8 Procedure: 1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; titanium dioxide is added to it and stirred well. 2. Stearic acid, simethicone, glyceryl monostearate, cetosteryl alcohol, cetyl alcohol, and sorbitan stearate are heated to 70°-75°C. 3. Glycerin, sorbitol, Tween 80 and purified water are heated to 75°-75°C. 4. Xanthum gum is dispersed in glycerin and added to the material of step 3. 5. The material of step 2 is added to the material of step 4 and allowed to cool. 6. The material of step 1 is added to the material of step 5 and allowed to cool to room temperature to obtain the cream. SUPPOSITORY COMPOSITIONS EXAMPLE 19 Ingredient gm/10 units Purified euphorbia extract 0.50 Polyethylene glycol 4000 (PEG 4000) 3.56 Polyethylene glycol 1000 (PEG 1000) 12.46 Polyethylene glycol 400 (PEG 400) 1.78 Propylene glycol 1.50 Glycerin 0.20 Procedure: 1) PEG 4000, PEG 1000 and PEG 400 are melted together and mixed well. 2) Euphorbia extract is dissolved in propylene glycol at 40-45°C with constant stirring. 3) The material of step 2 is added to the material of step 1 and mixed well. 4) The material of step 3 is poured into suppository moulds and cooled. 5) Suppositories thus formed are removed from moulds and packed suitably. EXAMPLE 20 Ingredient gm/l0 units Purified euphorbia extract 0.5 Propylene glycol 4.5 Emulsifying wax 9.0 Beeswax 4.0 Span 80 2.0 Procedure: 1) Emulsifying wax and beeswax are melted together and mixed. 2) Span 80 is added to the material of step 1 and mixed. 3) Euphorbia extract is dissolved in propylene glycol at 40-45°C with constant stirring. 4) The material of step 3 is added to the material of step 2 and mixed well. 5) The material of step 4 is poured into suppository moulds and cooled. 6) Suppositories thus formed are removed from moulds and packed suitably. EXAMPLE 21 Ingredient gm/l0 units Purified euphorbia extract 0.5 Propylene glycol 1.5 Witepsol-45 16.0 Cetyl alcohol 1.0 Beeswax 1.0 Procedure: 1) Cetyl alcohol, beeswax and Witepsol-45 are melted together. 2) Euphorbia extract is dissolved in propylene glycol at 40-45°C with const 3) The material of step 2 is added to the material of step 1 and mixed well. 4) The material of step 3 is poured into suppository moulds and cooled. 5) Suppositories thus formed are removed from moulds and packed suitably. EVALUATION OF CLINICAL EFFICACY OF CAPSULES AND CREAM The effective dose of extract of Euphorbia prostrata in nociceptive and inflammatory animal models varied from 5-20 mg/kg in mice and rats. Moreover, the maximum tolerable dose is more than 2000 mg/kg in mice and rats. Based on body surface area to body weight ratios, the expected dose of extract of Euphorbia prostrata for human studies could be in between 50 -200 mg for 60 kg human being (Paget and Barnes, 1964; Freireich et al., 1966). It is observed that the maximum human therapeutic dose (200 mg for 60 kg human being) is approximately 57 and 112 times less than the maximum dose employed in the acute toxicity studies in mice and rats respectively calculated based on body surface area to body weight ratios. Results of the clinical trials conducted at RML and LNJP hospitals, Delhi (India) The optimal dose, efficacy, safety and patient tolerability of 50 and 100 mg capsule formulations of extract of Euphorbia prostrata in hemorrhoidal attacks was evaluated in a double blind, placebo controlled, prospective, comparative and a randomized study. The duration of study was 8 months and protocol therapy was for 10 days. A total of 125 patients entered the study, out of which 72 patients suffered from degree I hemorrhoids and 53 patients suffered from degree II hemorrhoids. The patients in each category were randomized into 3 treatment groups i.e. TDA, TDB and TDC (i.e. 50 mg, 100 mg and placebo capsules). All patients were evaluated on day 5 and day 10 of starting therapy. A follow up of 3 months was done. The clinical examination was carried out to score the signs and symptoms i.e. proctorrhagia, anal discomfort, pain, anal discharge and proctitis at Day 0, Day 5 and Day 10. The degree of improvement on individual clinical parameters was also assessed from day 0, Day 5 and Day 10. The number of episodes of bleeding with bowel action and utilization of analgesics and topical medication as rescue medication was also assessed at Day 0, Day 5, and Day 10. For statistical description, all patients were included in "Intent to treaf analysis. Kruskal Wallis test and Wilcoxan signed rank test for qualitative variables and paired t-test and one¬way ANOVA for quantitative analysis were applied. The study demonstrated that 100 mg capsule of extract of Euphorbia prostrata (TDB) and 50 mg capsule of extract of Euphorbia prostrata (TDA) was generally more effective than placebo (TDC) group in all the efficacy parameters of hemorrhoids. All the groups tolerated the drugs well and showed minimal side effects. All the laboratory parameters were normal at baseline as well as at the end of the therapy in all the 3 treatment groups. Previous studies have demonstrated the efficacy and safety of extract of Euphorbia prostrata in the treatment of hemorrhoids in an uncontrolled fashion. In this study, extract of Euphorbia prostrata in two doses i.e. 50 and 100 mg showed good efficacy in treatment of hemorrhoids. However clinically, TDB group (100 mg capsule) showed better results in overall therapeutic evaluation. In Degree I hemorrhoids, certain parameters in TDA group showed better results. From the analysis it was found that out of the three treatment groups, maximum number of patients in TDB group underwent 5-day therapy. The prolonged 10-day therapy in TDA group might attribute to the better response in some parameters. However, at day 5, in few evaluation parameters i.e., and discomfort and proctorrhagia, complete recovery was found in maximum number of patients in TDB group. When the assessment on the degree of improvement in overall signs and symptoms of hemorrhoidal attacks was done, highest number of patients in TDB group showed substantial improvement at both assessment day i.e. Day 5 and Day 10. Clinically TDB group showed the better decrease in bleeding episodes at both Day 5 and Day 10. At 3 months follow up; both treatment groups i.e. TDA and TDB groups were found to be quite effective in terms of non-reoccurrence of bleeding. It was found that although bleeding reoccurred in slightly more number of patients in TDB group, no treatment was needed in highest number of patients in TDB than TDA group. It Also, at Day 5, TDB proved to be a better drug in bringing about complete disappearance of signs and symptoms of hemorrhoidal attacks. The better results shown by TDB group at Day 5 than at day 10 may be attributed to the fact that of all the treatment groups, highest number of patients in TDB groups underwent 5-day therapy and did not require prolonged therapy of 10 days. At 3 months follow up analysis; TDB was found to be better in all the aspects. The use of rescue medication in Degree I and Degree II hemorrhoids was seen in lesser number of patients in TDB group at the end of therapy i.e. Day 10. The impact of rescue medication might also explain some better results seen with lesser dose of 50 mg (TDA) as compared to high dose 100 mg (TDB) in few parameters. We claim: 1. A process for the preparation of an extract of the plant Euphorbia prostrata used in the preparation of a pharmaceutical composition for the treatment of anorectal or colonic disease such as hemorrhoids, fissures, cracks, fistulas, abscesses and inflammatory bowel disease comprising the extract from 0.1% to 99% by weight which comprises flavonoids and phenolic compounds, wherein the flavonoids are apigenin-7-glycoside, 1 - 4% by weight; luteolin-7-glycoside, 0.3 - 2% by weight; and apigenin, luteolin and quercetin, 0.001 - 0.3% by weight; and wherein the phenolic compounds are ellagic acid, 1-15% by weight; gallic acid, 1 - 12% by weight and tannins, 1 - 10% by weight, with pharmaceutically acceptable carrier(s)/base(s) as herein described, optionally with additional therapeutic agent(s) as herein described, comprising of the following steps: h. drying the plant Euphorbia prostrata under controlled conditions of temperature and humidity, i. making a powder from the dried plant. j. extracting the dry course powder with a polar solvent repetitively to form an extract, k. distilling the extract, I. washing the concentrated extract with a non-polar organic solvent, m. optionally re-extracting the washed polar extract in a medium polarity organic solvent, distilling the extract followed by dehydrating the extract, and n. drying the extract to produce the desired pharmaceutically acceptable extract capable of being used alongwith pharmaceutically acceptable carrier(s)/base(s). 2. A pharmaceutical composition comprising the extract as prepared in claim 1. 3. The pharmaceutical composition as claimed in claim 2, wherein the extract comprises apigenin-7-glycoside, 2.5 - 3.5% by weight; luteolin-7-glycoside, 0.5 - 1.5% by weight; apigenin, luteolin and quercetin, 0. 05 - 0.2% by weight; ellagic acid, 4 - 15% by weight; gallic acid, 4 - 12%) by weight; and tannins 3 - 8%) by weight. 4. The pharmaceutical composition as claimed in claim 1, wherein the composition is in the form of a cream, ointment, suppository, oral hard gelatin capsules, soft gelatin capsules and tablets (coated and uncoated). 5. A process for the preparation of an extract of the plant Euphorbia prostrata used in the preparation of a pharmaceutical composition for the treatment of anorectal or colonic disease pharmaceutical composition substantially as herein described and illustrated by the examples.

Full Text

FIELD OF THE INVENTION
The invention relates to a novel compositions comprising of an extract of the plant Euphorbia prostrata useful for the treatment of anorectal disease including hemorrhoids and colonic diseases. The novel compositions possess properties to control inflammation, prevent capillary bleeding and fragility in mammalians, particularly human beings.
BACKGROUND OF THE INVENTION
Among the various anorectal and colonic diseases, hemorrhoids occupy a prominent position and have been the subject of numerous clinical studies. Hemorrhoidal disease is characterised by bleeding, without any pain. Fresh blood spots occur immediately, on defecation. However, pain occurs when the hemorrhoids are secondarily infected, or complicated by thrombosis and anal fissures. Hemorrhoids can be caused by a variety of factors including hormones, genes, inflammation, infection, constipation, exercise, vascular stasis, diet, strain, physical stance in defecation, loss of connective tissue elasticity with age etc. The symptoms most widely recognized are bleeding, pain and prolapse (Hyams and Philpot, 1970; Smith, 1987). These may be accompanied by thrombosis, pruritis, edema etc. Hemorrhoids can be treated through reduction of inflammation and pain, haemostasis, wound healing and protection of vascular walls. Thus, an effective treatment of acute hemorrhoidal attacks should not only provide relief as early as 2-3 days after initiation of the treatment, but also reduce the recurrence of such attacks.
There exist several procedures for the treatment of hemorrhoids. WO8803398 patent application discloses surgical dressings for such treatment. Patents have been granted in respect of surgical devices such as European patent no. 0095142. U.S. Patent no. 4,621,635 has been granted for the use of lasers in the treatment of hemorrhoids. The techniques of cryopharmacotherapy and electrochemical techniques for treatment of hemorrhoids have also been patented vide European patent no. 0091405 and European patent no. 0116688, respectively. However, the biggest drawbacks of the above are the involvement of medical experts beyond mere prescription of medicines and probable hospitalization. Also, some of them are physically and/or psychologically unpleasant in application.
Several patents (U.S. patent nos. 4,160,148, 4,508,728, 4,797,392, 4,518,583 and 5,234,914) have been granted in respect of compositions containing certain wound healing agents to

provide symptomatic relief, by promoting tissue repair, reducing inflammation and
encouraging wound healing. Some of them like U.S. patent nos. 4,518,583 and 5,234,914 contain antimicrobial agents. These compositions, however, only relieve symptoms associated with inflammation, like heat, itching, redness, pain and swelling.
A number of compositions for the treatment of anorectal diseases (including hemorrhoids) are based on the anesthetic and vasoconstrictive properties of the constituents, but these provide only temporary symptomatic relief.
Patents in the United States of America (U.S. patent nos. 4,613,498, 4,626,433, 5,166,132, 5,219,880, 5,234,914 and 4,797,392) and Europe (European patents nos. 0225832 and 0513442) have been granted in respect of compositions with varying constituents, for topical application in the form of suitable and acceptable pharmaceutical carriers, such as salts, ointments, etc., with organic, inorganic or biological active agents. However, these compositions provide only temporary relief and are limited to local application and cannot be used for systemic use or oral administration.
A topical treatment for hemorrhoidal pain and for spasms of the sphincters and muscles located in the GI tract is disclosed in a granted patent (U.S. patent no. 5,595,753), which includes amino acid L-arginine in a pharmaceutically acceptable carrier. Another U.S. patent no. 5,591,436 has been granted for a composition for dietary supplement for the treatment of hemorrhoids. The composition comprises 60% to 95% Indian Barberry by weight; 4.8% to 38% Nagkesar by weight; and 0.2% to 2% Margosa tree leaves by weight.
Another U.S. patent no. 5,562,906 discloses the use of bark or berries of the species Xanthoxylum clava herculis L and Xanthoxylum americanum Hill, both of the yellow wood tree family, are employed for the treatment of hemorrhoids and other membrane and capillary disorders of the veins and arteries. Improved strength and flexibility of the veins, arteries and their constituent structures is obtained.
The flavonoidal constituents present in the extract of Euphorbia prostrata are reported to have anti-inflammatory properties. The phenolic compounds like ellagic and gallic acids and tannins are reported to have anti-inflammatory, haemostatic, gastro-protective and wound healing properties.

Other plants containing flavonoids including apigenin glycosides and luteolin glycosides are
Ixora arhorea (Rubiaceae), Bommervia hispida (Pteridaceae), Adenocalymma alliaceum (Bignomiaceae), Thalictrum thunbergii (Renunculaceae), Perilla frutescens (Labiateae), Chrysenthemum indicum, C. coronarium and Matricaria chamomilla (Compositae), Thymus membranaceous (Labiateae), Digitalis lanata (Scrophulariaceae), Cuminum cyminum and Petroselinum (Umbelliferae). Several species oiEuphorbia like Euphorbia minuta, Euphorbia microfolia, Euphorbia granulata (Euphorbiaceae) contain both apigenin and luteolin. Ellagic acid and other phenolic acids have been reported from different species of Euphorbia.
The safety of various components of the Euphorbia extract has been reported in the literature. Some of the reports also claim anti-mutagenic/ anti-carcinogenic/ anti-genotoxic properties of the components of the Euphorbia extract.
An Indian patent no. 186803 and several other patents (Australia, No. 698407; China, No. CN 1102387C; Europe, No. 868914; Russia, No. 2174396; South Africa, No. 97/2900; South Korea, No. 281679 and U.S., No. 5,858,371) have been granted to this applicant for a composition comprising a flavonoid containing extract of Euphorbia prostrata for treatment of anorectal and colonic diseases. The claimed extract comprises of very high contents of flavonoids (35 - 62% by weight), which is very expensive and time consuming to purify. Further, the presence of the phenolic compounds that are therapeutically useful for treatment of anorectal and colonic diseases due to their hemostatic and astringent properties, has not been established in the claimed extract. The presence of the phenolic compounds like ellagic acid, gallic acid and tannins comprising of these acids makes the claimed extract more effective for treatment of hemorrhoids and other colonic diseases, as the phenolic compounds are known gastroprotective agents. The antimicrobial properties of these phenolic compounds further prevent secondary infections often accompanied with hemorrhoids, fissures, fistulas etc.
Furthermore, the process of extraction described in the said patent application comprises a step of treatment of the combined and concentrated extract with hot water and then taking the water-soluble portion for obtaining the tlavonoidal components. It was discovered in the present invention that the water- soluble portion contains substantial amount of phenolic compounds. The new method of the present invention comprises washing of the extract with hexane where only waxy materials and pigments are removed and there is no significant loss of phenolic compounds.

The inventors have further researched, and have found that the novel flavonoid and phenolic
compounds containing extract of Euphorbia prostrata disclosed in the present invention exhibits improved pharmacological response in comparison to existing compositions employing flavonoids either from Euphorbia or other sources. Further, the extraction procedure of the disclosed Euphorbia prostrata extract in the present invention is more cost effective and less time consuming in comparison to that of existing compositions employing flavonoids isolated from Euphorbia prostrata. The commercial implications of the improved and economic extraction procedure led the inventors to re-establish the pharmacological and toxicological validity of the new extract. The results were strikingly better than those of the equivalent flavonoid doses of the more purified extract of Euphorbia prostrata as disclosed earlier.
The present invention provides a pharmaceutical composition that is safe and painless and has long-term effectiveness.
OBJECTIVE OF THE INVENTION
An objective of the present invention is to provide compositions for treating anorectal diseases including hemorrhoids and colonic diseases.
Another objective for the present invention is to provide compositions for treating anorectal and colonic diseases including hemorrhoids comprising of an extract of the plant Euphorbia prostrata containing flavonoids and phenolic compounds, optionally with other therapeutic agent(s) and/or pharmaceutically acceptable carrier(s)/base(s).
SUMMARY OF THE INVENTION
A composition and a method for treating anorectal diseases including hemorrhoids and colonic diseases using an extract of Euphorbia prostrata with long-term effectiveness and low prolapse rates. The treatment includes administration by oral route an effective amount of composition comprising of a pharmaceutically acceptable carrier and mixture of flavonoids and phenolic compounds extracted from Euphorbia prostrata. The treatment also includes local application to the hemorrhoids and anorectal tissues, an effective amount of composition comprising of a pharmaceutically acceptable carrier and a mixture of flavonoids and phenolic compounds extracted from Euphorbia prostrata.

STATEMENT OF INVENTION
1. Accordingly the present invention relates to a process for the preparation of an extract
of the plant Euphorbia prostrata used in the preparation of a pharmaceutical composition for the treatment of anorectal or colonic disease such as hemorrhoids, fissures, cracks, fistulas, abscesses and inflammatory bowel disease comprising the extract from 0.1% to 99% by weight which comprises flavonoids and phenolic compounds, wherein the flavonoids are apigenin-7-glycoside, I - A% by weight; luteolin-7-glycoside, 0.3 - 2% by weight; and apigenin, luteolin and quercetin, 0.001 -0.3% by weight; and wherein the phenolic compounds are ellagic acid, 1-15% by weight; gallic acid, 1 - 12% by weight and tannins, 1 - 10%> by weight, with pharmaceutically acceptable carrier(s)/base(s) as herein described, optionally with additional therapeutic agent(s) as herein described, comprising of the following steps:
a. drying the plant Euphorbia prostrata under controlled conditions of
temperature and humidity,
b. making a powder from the dried plant,
c. extracting the dry course powder with a polar solvent repetitively to form an
extract,
d. distilling the extract,
e. washing the concentrated extract with a non-polar organic solvent,
f optionally re-extracting the washed polar extract in a medium polarity organic solvent, distilling the extract followed by dehydrating the extract, and
g. drying the extract to produce the desired pharmaceutically acceptable extract
capable of being used alongwith pharmaceutically acceptable
carrier(s)/base(s).
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides compositions that can be orally administered as well as uniformly applied to the affected region. It reduces inflammation, and soothes the feeling of itching and burning associated with it. The invention provides relief from pain associated with hemorrhoids. The invention also significantly reduces bleeding and accelerates tissue re-growth in the affected hemorrhoidal tissue. The invention is useful in the treatment of lesions, other than hemorrhoids in the anorectal area and can be formulated in several types of dosage forms. There are no side effects from the use of the composition in human beings. Further, the

treatment is not physically or psychologically unpleasant in its administration and/or
application. The plant Euphorbia prostrata (Family: Euphorbiaceae) was identified as being relevant in the study of anorectal and colonic diseases, including hemorrhoids. Euphorbia prostrata is well known to the Indian traditional medicine in the use of treatment for asthma, bloody dysentery and sores. Previously, five new compounds were discovered and identified by the inventors in Euphorbia prostrata namely luteolin, 6-methoxy-quercetin-glycoside, Quercetin, and glycosides of luteolin and apigenin. Now two more phenolic compounds, namely ellagic acid and gallic acid were identified in the extract prepared in a different manner, which were found to be of additional therapeutic value for treatment of hemorrhoids.
The compounds of the present invention are standardized to pharmaceutically acceptable specifications in order to ensure reproducibility from batch to batch. The result is the extract of Euphorbia prostrata, which is the main active agent in the improved anorectal composition. Another unique feature of this extract of Euphorbia prostrata is that it is prepared in such a manner that the resulting composition is easily dispersible in water due to presence of many hydrophilic compounds besides flavonoids.
The pharmaceutical composition comprising of the extract of Euphorbia prostrata as the active ingredient contains flavonoids and phenolic compounds, out of which apigenin-7-glycoside is about 1 - 4% by weight of the extract, luteolin-7-glycoside is about 0.3 - 2% by weight of the extract, and apigenin, luteolin and quercetin are about 0.001 - 0.3% by weight of the extract. The extract also contains 1 - 10% by weight of tannins, 1-15% by weight of ellagic acid, and 1 - 12% by weight of gallic acid.
In an embodiment of the present invention. Euphorbia prostrata was found to be devoid of any toxic diterpene content like phorbol or ingenol esters, unlike many other species of Euphorbia.
The pharmaceutical compositions of the present invention may also contain additional therapeutic agents from other plants and/or from different pharmacological groups such as anesthetics, vasoconstrictors, protectants, counterirritants, astringents, wound healing agents, antimicrobials, keratolytics, anticholinergics or their pharmaceutically acceptable salts, used either alone or in combinations thereof.
Preferably, it would be beneficial to include other wound healing and antimicrobial agents, which will result in the improvement of the effectiveness of the composition.

The anesthetics include but are not limited to benzocaine, diperodon, pramoxine, camphor,
dibucaine, phenol, tetrtacaine, lignocaine and phenacaine, used either alone or in combinations thereof. The amount of such anesthetics could vary between 0.25% and 25% by weight.
The vasoconstrictors include but are not limited to ephedrine and phenylephrine, used either alone or in combinations thereof. The amount of such vasoconstrictors may vary between 0.005% and 1.5% by weight.
The protectants include but are not limited to aluminum hydroxide gel, calamine, cocoa butter, cod or shark liver oil, glycerin in aqueous solution, kaolin, lanolin, mineral oil, starch, white petrolatum, wool alcohol, zinc oxide, vegetable or castor oil, polyethylene glycol and propylene glycol, used either alone or in combinations thereof. The amount of such protectants may vary between 5.0% and 88.0% by weight.
The counterirritant includes but is not limited to menthol in aqueous solution. The amount of such counterirritant may vary between 0.25 - 2.5% by weight.
The astringents include but are not limited to calamine, zinc oxide, hamamelis water, bismuthresorcinol compound, bismuth subgallate, Peruvian balsam, aluminium chlorhydroxy allantoinate, tannic acid and tannins, used either alone or in combinations thereof The amount of such astringents may vary between 0.2% and 60.0%) by weight. The tannins additionally may be derived from plants such as Butea monosperma, Butea parviflora and Butea frondoza (Family: Leguminosae).
The wound healing agents include but are not limited to vitamin A and vitamin D in an amount of between 0.005% and 0.04% by weight. Also Peruvian balsam can be included by weight in an amount of between 0.5%) and 2.5% by weight. Also cod liver oil can be included in an amount between 1.0% and 6.0% by weight.
The antimicrobial agents include but are not limited to benzethonium chloride, benzalkonium chloride, boric acid, 8-quinolinol benzoate, secondary amyltricresols, cetylpyridinium chloride, phenol, menthol, chlorothymol, camphor and 8-hydroxyquinoline sulfate, used either alone or in combinations thereof. The amount of such antimicrobial agents may vary between 0.02% and 40.0%) by weight.

The keratolytics include but are not limited to aluminium chlorhydroxy allantoinate and
resorcinol, used either alone or in combinations thereof The amount of such keratolytics may vary between 0.2% and 3.5% by weight.
The anticholinergics include but are not limited to atropine or other solanaceous type alkaloids, used either alone or in combination thereof. The amount of such anticholinergics may vary between 0.02% and 0.1% by weight.
The pharmaceutical compositions of the present invention can be prepared by dissolving or dispersing the extract in appropriate base(s)/carrier(s). The pharmaceutical composition into different dosage forms can be formulated using conventional excipients and techniques known to art. Pharmaceutical dosage bases or carriers used in the present invention can be capsules (hard or soft), tablets (coated or uncoated), ointments, creams, gels, foams, solutions, suspensions, medicated pad, bandage, powder, aerosols, sprays, film, flakes, modified release dosage forms (sustained release, controlled release, delayed release, prolonged release, timed release, and the like) sublingual dosage forms, wafers, caplets, parenteral dosage forms to be infiltered at the site of the injection, and the like.
The capsules comprise of 25-300 mg of the extract of Euphorbia prostrata, preferably 50-100 mg along with pharmaceutical excipients. Similarly, tablets may be prepared by dispersing 25-300 mg of the extract of Euphorbia prostrata, preferably 50-100 mg in a suitable carrier, optionally along with other pharmaceutical excipients. The tablets may be coated or uncoated.
The cream or ointment may contain 0.1 - 10% w/w, preferably 0.2 - 5% w/w of the extract of Euphorbia prostrata.
In an embodiment of the present invention, the capsule may be taken, subject to a maximum of 300 mg of extract per day, along with topical application containing the same extract, as and when required.
The granules in ready dispersible and effervescent form may be prepared by using excipients such as sucrose, mannitol, sodium bicarbonate, citric acid, and the like.
The cream may be prepared by emulsifying the aqueous phase, containing 0.1 - 10% w/w preferably 0.2 - 5% w/w of the extract, along with a suitable oleaginous phase.

Other alternatives can be prepared by formulating the extract in 0.1 -10% w/w as Hydrophilic
ointment USP with absorption bases; or water soluble bases such as Polyethylene glycol ointment USNF; or as water absorbing bases such as Hydrophilic petrolatum USP, Lanolin USP; or in hydrocarbon bases such as White petrolatum USP.
The suppository compositions may contain either hydrophobic or hydrophilic base and includes cocoa butter, glycerinated gelatin, hydrogenated vegetable oils, mixtures of polyethylene glycols of various molecular weights, polyoxyethylene sorbitan fatty acid esters and polyethylene stearates, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, chemically modified starch or a combination of these materials.
The foam and spray bases may contain one or more of aqueous and nonaqueous solvents, propellants, surfactants, suspending agents and stabilizing agents.
The medicated pads may contain one or more of the following: Water, glycerin, propylene glycol, alcohol and Hamamelis water.
EVALUATION OF PHARMACOLOGICAL ACTIVITY OF THE EXTRACT
Antihaemorrhoidal activity
The antihaemorrhoidal activity of the Euphorbia prostrata extract was assessed and compared with reference drug, diosmin using anorectal : body weight ratio model in rats (modified method of Jia et al., 2000). Euphorbia prostrata extract (5, 10, 20 and 40 mg/kg, p.o., 7 days) showed significant decrease in anorectal : bodyweight ratio as well as inflammation and redness at the site when compared to control (carrageenan - treated group). Diosmin (50 mg/kg, p.o., 7 days) also significantly decreased anorectal : body weight ratio in rats. Further, individual components of Euphorbia prostrata extract i.e. apigenin-7- glucoside (0.478 mg/kg, p.o.), ellagic acid (1.204 mg/kg, p.o.), and gallic acid (1.123 mg/kg, p.o.) on chronic administration (7 days) also showed effect. In histopathological examination of the anorectum, normal animals administered per orally with 0.5% CMC alone showed intact mucosal layer with prominent mucosal cells and mild leukocyte migration, where as carrageenan - treated animals showed uneven thick mucosal layer with disrupted mucosal cells and severe leukocyte migration suggesting the presence of a significant inflammation. Further, both Euphorbia prostrata extract (10 mg/kg, p.o., 7 days) and diosmin (50mg/kg,

p.o., 7 days) showed intact mucosal layer with prominent mucosal cells and mild leukocyte
migration. Anti-inflammatory activity
Carrageenan - induced paw edema in rats
Carrageenan (1% w/v) produced paw edema (Winter et al., 1962) in control group, indicating inflammatory response. Euphorbia prostrata extract (5, 10, 20, and 40 mg/kg, p.o.) dose dependently and significantly decreased carrageenan-induced increase in paw volume as compared to control rats (EDso 15.42 - 15.84 mg/kg, p.o.) The onset of anti-inflammatory effect was rapid and lasted up to 4 hrs after carrageenan injection. The anti-inflammatory effect of Euphorbia prostrata extract at doses 20 and 40 mg/kg was comparable to that of nimesulide (2 mg/kg, p.o.), a preferential cyclooxygenase - 2 (COX - 2) inhibiting NSAID.
Further, solution of Euphorbia prostrata extract (0.5- 4.0 % equivalent to I - 8 mg/kg, applied topically on paw) significantly decreased the carrageenan - induced increase in paw volume. The topical anti-inflammatory effect of Euphorbia prostrata extract (1%) was comparable to that of nimesulide (2%) at 60 min in rats.
Antinociceptive activity
Acetic acid- induced writhing in mice (Koster et al., 1959)
Euphorbia prostrata extract (2 mg/kg, p.o.) exhibited maximum antinociceptive effect after 90 minutes of its administration in time response study. This effect lasted up to 2 hrs of its administration. Nimesulide (2 mg/kg), a reference drug also significantly increased the pain threshold in mice. Euphorbia prostrata extract (I, 2, 5, and 10 mg/kg, p.o.) produced dose -dependent antinociceptive effect in mice. Apigenin -7- glucoside (0.5, 1.0, and 2.0 mg/kg, p.o.) and luteolin glucoside (0.25, 0.5, and 1.0 mg/kg, p.o.) also exhibited dose-dependent antinociceptive effect in writhing test.
Carrageenan — induced hyperalgesia in rats
Carrageenan (1% w/v) significantly decreased paw withdrawal latency in paw pressure test (Randall and Selitto, 1957). Euphorbia prostrata extract (10, 20, and 40 mg/kg, p.o.)

significantly increased paw withdrawal latency as compared to carrageenan - treated rats.
Nimesulide (2 mg/kg), a reference drug also increased paw withdrawal latencies in rats.
Carrageenan - induced pleurisy in rats
Pleurisy was induced with carrageenan using a method reported by Engelhard et al., 1995. A single-dose administration of Euphorbia prostrata extract (20 and 40 mg/kg, p.o.) produced significant inhibition of exudates formation and migration of polymorphonuclear leukocytes and monocytes in carrageenan-induced pleurisy.
Superoxide radical scavenging activity
Euphorbia prostrata extract (25 µg) exhibited a superior superoxide radical scavenging activity of 38.70% in comparison to tocopherol (25µg), which showed a similar activity of 25.54%.
Wound healing activity in rats
The wounds were developed by skin excision method in rats as described by Vishnu Rao et al., 1996. Euphorbia prostrata extract cream (1.75%) showed significant wound healing activity in comparison to placebo cream on Day 4, 8, and 12 in wound excision model in rats.
Haemostatic activity
Euphorbia prostrata extract (1%, 2%, and 4% solution) significantly reduced the bleeding time as compared to control group (distilled water). Moreover, the reduction in bleeding time with 4% solution of Euphorbia prostrata extract was comparable to 2.5% solution of alginic acid.
MECHANISM OF ANTI-HEMORRHOIDAL ACTIVITY OF THE EXTRACT:
Euphorbia prostrata extract mainly comprises of flavonoids (apigenin -7- glucoside, luteolin -7 -glucoside), ellagic acid, gallic acid, and tannins. Phenolic compounds are widespread in the plant kingdom. The major groups of phenolic compounds are flavonoids and phenolic acids. They are one of the main constituents of several medicinal plants that have been used as folk medicine throughout the world. Interest has recently been focused on flavonoids and flavanoids because of their broad pharmacological activities. These flavonoids are well

reported for analgesic, anti-Inflammatory, antioxidant, antiangiogenic, anti-allergic, antiviral
and antimutagenic activity (Lin et al., 2001; Formica and Regelson, 1995; Fotsis et al., 1997; Wang et al., 1998; Block et al., 1998). It is reported that apigenin is a most potent inhibitor of transcriptional activation of both COX-2 and iNOS enzyme in lipopolysaccharide activated RAW 264.7 macrophages. It is further suggested that suppression of transcriptional activation of COX-2 and iNOS by apigenin might mainly be mediated through inhibition of IKB (inhibitor of KB). Such type of modulation of COX-2 and iNOS by apigenin may be important in the prevention of carcinogenesis and inflammation (Liang et al., 1999). Further, it is also suggested that antioxidant properties of apigenin -7 - glucoside contribute to its anti¬inflammatory activity in various animal models (Fuchs and Milbradt, 1993). Delia Loggia et al, 1986 also reported that apigenin -7-glucoside and luteolin -7 -galactoside shows a dose dependent inhibition of the oedematous response to croton oil. In CCl4 - induced peroxidation, apigenin and luteolin had shown significant antiperoxidative activity in rat liver microsomes (Cholbi et al., 1991). Xagorari et al., 2001 reported that luteolin inhibits protein tyrosin phosphorylation, nuclear factor- ΚB mediated gene expression and pro-inflammatory cytokine production in murine macrophages. Ellagic acid is one of the major constituents of Euphorbiaprostrata extract also reported to suppress histamine release mediated by histamine liberators (compound 48/80, dextran and polymyxin B sulfate) in vivo (Bhargava and Westfall, 1969). Moreover, the anti-inflammatory effects of flavonoids comprise inhibition of histamine release, modulation of the prostanoids metabolism and antioxidant properties. It is speculated that analgesic, anti-inflammatory and antioxidant activity of various flavonoid components of Euphorbia prostrata extract (apigenin-7- glucoside, luteolin -7 -glucoside) and ellagic acid and/or gallic acid may contribute in healing of inflammatory tissue damage in hemorrhoidal conditions.
Phenolic acids are reported to activate intrinsic blood coagulation by activation of Hageman factor and cause a state of hypercoagulability. Although the hypercoagulable state persists for as long as 4 hours after i.v. administration, no thrombotic phenomena has been reported (Girolami and Cliffton, 1967).
Vegetable tannins are water-soluble phenolic compounds including both hydrolysable and condensed tannins that are present in every food plant. Hydrolysable tannins contain either gallotannins or ellagiotannins that yield gallic acid or ellagic acid respectively on hydrolysis. It is well reported that tannic acid has antimicrobial properties, which is associated with the ester linkage between gallic acid and other sugar or alcohol groups (Chung et al, 1993; 1995).

From the anti-hemorrhoidal studies conducted in animals, it is evident that the Euphorbia
prostrata extract has better efficacy than the purified flavonoids or other constituents alone.
The various studies conducted on Euphorbia prostrata extract are listed below in Figures 1-9.
Figure 1: Effect of Euphorbia prostrata extract (14395) against carrageenan-induced
hemorrhoids in rats.
Figure 2: Effect of individual component of Euphorbia prostrata extract (14395) against
carrageenan-induced hemorrhoids in rats.
Figure 3: Effect of Euphorbia prostrata extract (14395) against carrageenan-induced
paw oedema (oral).
Figure 4: Effect of Euphorbia prostrata extract (14395) against carrageenan-induced
paw oedema (topical).
Figure 5: Effect of Euphorbia prostrata extract (14395) against acetic acid-induced
chemonociception in mice
Figure 6: Effect of principal components of Euphorbia prostrata extract (14395) against
acetic acid-induced chemonociception in mice.
Figure 7: Effect of Euphorbia prostrata extract (14395) against carageenan-induced
hyperalgesia in rats.
Figure 8: Effect of Euphorbia prostrata extract (14395) on bleeding time in liver
incision model.
Figure 9: In vitro superoxide radical scavenging activity of Euphorbia prostrata extract
(14395).
SAFETY STUDIES
Effect on central nervous system
The effect of Euphorbia prostrata extract on the central nervous system were assessed from acute studies of effect on the appearance and gross behavior of rats and mice, the performance

of mice on a rotating rod, open field behavior in rats, locomotor activity in mice using
actophotometer, rectal temperature in rats, forced swimming despair behavior in mice, pentobarbitone-induced sleeping time in mice. Behaviorally, Euphorbia prostrata extract was well tolerated by both mice and rats (up to 2000 mg/kg, p.o.) following single oral administration and following multiple dose oral administration (up to 130 mg/kg in mice for 28 days and up to 90 mg/kg in rats for 28 days). In diazepam-controlled mouse studies. Euphorbia prostrata extract did not (a) alter gross behavior; (b) impair motor co-ordination (rotarod test); (c) impair motor activity using actophotometer after oral administration at doses 100, 200 and 400 mg/kg. In chlorpromazine-controlled rat study. Euphorbia prostrata extract did not alter rectal temperature at doses 100, 200, and 400 mg/kg. In imipramine-controlled mouse study, Euphorbia prostrata extract at doses 100, 200, and 400 mg/kg did not alter forced swimming despair behavior after single oral administration. Furthermore, Euphorbia prostrata extract did not interact with pentobarbitone-induced sleeping time at doses 100, 200, and 400 mg/kg in mice. In diazepam-controlled rat study. Euphorbia prostrata extract did not impair open field behavior (ambulatory and rearing behavior) at doses 100, 200, and 400 mg/kg.
Effect on cardiovascular system
Euphorbia prostrata extract did not cause any change in normal ECG, blood pressure, and heart rate in rats following single oral administration up to 400 mg/kg and following multiple dose oral administration (up to 90 mg/kg in rats for 28 days).
Effect of on respiratory system
Euphorbia prostrata extract did not alter basal insufflation pressure of trachea after 7 days administration of 400 mg/kg, p.o. of Euphorbia prostrata extract in guinea pig.
Effect on gastrointestinal system
Euphorbia prostrata extract did not alter basal acid secretion and gastrointestinal integrity upon single administration up to 400 mg/kg, p. o. in rats. In mice, there was no alteration in gut motility up to 400 mg/kg, p.o. of Euphorbia prostrata extract after 1 h of single dose oral administration.

TOXICOLOGICAL STUDIES
Single dose toxicity:
No mortality was observed when Euphorbia prostrata extract was administered up to 2000 mg/kg, p.o. in rats and mice.
Repeat dose toxicity:
Mice: Repeated administration (32.50 mg/kg, 65.0 mg/kg and 130.0 mg/kg, p.o.) of Euphorbia prostrata extract for 28 days to mice did not exhibit mortality (NOEL 130 mg/kg, p.o. in mice).
Rats: Repeated administration (22.50 mg/kg, 45.0 mg/kg and 90.0 mg/kg, p.o.) of Euphorbia prostrata extract for 28 days to rats did not exhibit mortality (NOEL 90 mg/kg, p.o.). In another study, repeated administration of Euphorbia prostrata extract 428 mg/kg, p.o., for 14 days did not produce significant alterations in body weight, organ weights, biochemical, and histopathological changes in comparison to control animals.
Guinea pig: Repeated administration of Euphorbia prostrata extract up to 300 mg/kg to guinea pig for 14 days did not produce significant alterations in body weight, organ weights, biochemical, and histopathological changes in comparison to control animals.
Examples are provided below to illustrate the aspects of the present invention. However, they do not intend to limit the scope of the present invention.
EXAMPLES
General process of manufacture of the Extract:
Qualified professionals collected the plant Euphorbia prostrata from various parts of India. The plant was identified and characterized according to WHO guidelines (WHO/TRM/91.4, Programme Traditional Medicines World Health Organization Geneva, 1991) and was dried under controlled conditions of temperature and humidity. The whole plant was ground to coarse powder. The coarse powder was extracted using a polar solvent like an alkanol or acetone with or without water. The extract was concentrated and washed with a non-polar solvent like a hydrocarbon or chlorinated hydrocarbon. The washed extract was optionally further extracted into a medium polar solvent like ethyl acetate or ethyl methyl ketone. The

final extract was optionally dehydrated with a suitable dehydrating agent and dried, either in a
tray drier or in a spray drier, milled to a powder form, sifted to the desired particle size and packed in a suitable container to protect from moisture.
EXAMPLE 1
The powdered drug (500 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 3000 It. of 80% aqueous methanol at about 60°C. The process was repeated 5 times till the drug was exhausted. The aqueous-methanolic extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of hexane to remove the wax and fatty material. The washed extract was dried completely for several hours at 60°C under vacuum. The final extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture.
EXAMPLE 2
The powdered drug (700 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 4500 It. of methanol at about 60°C. The process was repeated 5 times till the drug was exhausted. The methanolic extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of dichloromethane to remove the wax and fatty material. The washed extract was dried completely for several hours at 60°C under vacuum. The final extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture.
EXAMPLE 3
The powdered drug (350 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 3000 It. of 80% aqueous acetone at about 50°C. The process was repeated 5 times till the drug was exhausted. The aqueous-acetone extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of hexane to remove the wax and fatty material. The washed extract was dried completely for several hours at 60°C under vacuum. The tlnal extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture.

EXAMPLE 4
The powdered drug (500 kg) was packed in a S.S. extractor. The extraction was affected by percolation with 3000 It. of 80% aqueous methanol at about 60°C. The process was repeated 5 times till the drug was exhausted. The aqueous-methanolic extracts were combined and concentrated by distillation. The concentrated extract was washed with 5-10 volumes of hexane to remove the wax and fatty material. The washed extract was again extracted with ethyl acetate. The ethyl acetate extract was dehydrated with anhydrous sodium sulphate and concentrated by distillation. The concentrated extract was dried completely for several hours at 60°C under vacuum. The final purified extract was milled to a fine powder, sifted for uniform particle size and packed to protect from the moisture.
Process of evaluation of the Extract
The extract of Euphorbia prostrata of the above-mentioned examples was characterised by High Performance Liquid Chromatography (HPLC). The HPLC was performed under following conditions and using Waters system equipped with M510 pumps and data station with Millenium software.
Mobile phase: A linear gradient of Mobile Phase A (2% acetic acid in Water) and Mobile Phase B (2% acetic acid in Acetonitrile) according to the following table:
(Table Removed)
Column: C18 (250X4.6 mm/5 !)
Flow Rate: 1 ml/min
Detector: UV absorbance at 335 nm

The HPLC chromatogram showed a number of peaks, the major ones corresponding to galHc
acid, ellagic acid, luteolin glucoside and apigenin glucoside. The two peaks corresponding to the flavonoid components luteolin glucoside and apigenin glucoside were used as the chemical and pharmacological marker for quantitation of the product. A sum of the two peaks was calculated corresponding to standard apigenin glucoside and the measure was expressed as the Total Flavonoids.
CAPSULE COMPOSITIONS
EXAMPLE 5
Ingredient mg/capsule
Purified euphorbia extract 100,0
Microcrystalline cellulose 200.8
Mannitol 72.0
Talc 3.2
Sodium starch glycollate 12.0
Colloidal silicon dioxide 12.0
Procedure:
1) Extract, microcrystalline cellulose and mannitol are sifted and mixed together.
2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together.
3) The materials of step 1 and 2 are mixed.
4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%.
5) The filled capsules are packed in air-tight packages.
EXAMPLE 6
Ingredient mg/capsule
Purified euphorbia extract 100.0
Microcrystalline cellulose 150.0
Mannitol 65.0
Lactose 50.0
Talc 3.0
Sodium starch glycollate 17.0
Colloidal silicon dioxide 15.0

Procedure:
1) Extract, microcrystalline cellulose, lactose and mannitol are sifted and mixed together.
2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together.
3) The materials of step 1 and 2 are mixed.
4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%.
5) The filled capsules are packed in air-tight packages.
EXAMPLE 7
Ingredient mg/capsule
Purified euphorbia extract 100.0
Microcrystalline cellulose 50.0
Mannitol 65.0
Lactose 150.0
Talc 3.0
Sodium starch glycollate 17.0
Colloidal silicon dioxide 15.0
Procedure:
1) Extract, microcrystalline cellulose, lactose and mannitol are sifted and mixed together.
2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together.
3) The materials of step 1 and 2 are mixed.
4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of 400 mg ± 2%.
5) The filled capsules are packed in air-tight packages.
EXAMPLE 8
Ingredient mg/capsule
Purified euphorbia extract 100.0
Microcrystalline cellulose 175.0
Mannitol 80.0
Talc 5.0
Sodium starch glycollate 15.0
Colloidal silicon dioxide 25.0
Procedure:
1) Extract, microcrystalline cellulose and mannitol are sifted and mixed together.
2) Talc, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together.
3) The materials of step 1 and 2 are mixed.
4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%.
5) The filled capsules are packed in air-tight packages.
EXAMPLE 9
Ingredient mg/capsule
Purified euphorbia extract 100.0
Microcrystalline cellulose 135.0
Starch 25.0
Dibasic calcium phosphate 110.0
Talc 2.0
Magnesium stearate 3.0
Sodium starch glycollate 10.0
Colloidal silicon dioxide 15.0
Procedure:
1) Extract, microcrystalline cellulose, starch and dibasic calcium phosphate are sifted and mixed well.
2) Talc, magnesium stearate, sodium starch glycollate and colloidal silicon dioxide are passed through fine sieves individually and then mixed together.
3) The materials of step 1 and 2 are mixed.
4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of 400 mg ± 2%.
5) The filled capsules are packed in air-tight packages.

EXAMPLE 10
Ingredient mg/capsule
Purified euphorbia extract 100.0
Microcrystalline cellulose 90.0
Lactose 50.0
Starch 122.0
Talc 3.0
Magnesium stearate 3.0
Croscarmellose sodium 12.0
Colloidal silicon dioxide 20.0
Procedure:
1) Extract, microcrystalline cellulose, lactose & starch are sifted and mixed together.
2) Talc, magnesium stearate, croscarmellose sodium and colloidal silicon dioxide are passed through fine sieves individually and then mixed together.
3) The materials of step 1 and 2 are mixed.
4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of 400 mg ± 2%.
5) The filled capsules are packed in air-tight packages.
EXAMPLE 11
Ingredient mg/capsule
Purified euphorbia extract 100.0
Mannitol 176.0
Starch 100.0
Talc 2.0
Croscarmellose sodium 5.0
Sodium starch glycollate 12.0
Sodium stearyi fumarate 5.0
Procedure:
1) Extract, mannitol and starch are sifted and mixed together.
2) Talc, croscarmellose sodium, sodium starch glycollate and sodium stearyi furmate are passed through fine sieves individually and then mixed together.
3) The materials of step 1 and 2 are mixed.

4) The material of step 3 is filled into empty hard gelatin capsules at an average fill weight of400mg± 2%.
5) The filled capsules are packed in air-tight packages.
TABLET COMPOSITIONS EXAMPLE 12 (Uncoated tablet)
Ingredient mg/tablet
Purified euphorbia extract 100.0
Microcrystalline cellulose 120.0
Mannitol 80.0
Croscarmellose sodium 10.0
Lactose 66.0
Talc 4.0
Colloidal silicon dioxide 10.0
Croscarmellose sodium 10.0
Procedure:
1) Extract, microcrystalline cellulose, mannitol, croscarmellose sodium and lactose are sifted and mixed together.
2) The material of step 1 is compacted.
3) The compacts of step 2 are passed through sieve and mixed.
4) Talc, colloidal silicon dioxide and croscarmellose sodium are passed through fine sieve and mixed together.
5) The material of step 3 is mixed with material of step 4.
6) The material of step 5 is compressed into tablets at an average weight of 400 mg ± 2%.
7) The tablets are packed in air-tight packages.
EXAMPLE 13 (Film-coated tablet)
Ingredient mg/tablet
Core tablet composition
Purified euphorbia extract 100.0
Microcrystalline cellulose 120.0
Mannitol 80.0
Croscarmellose sodium 10.0

Lactose 66.0
Talc 4.0
Colloidal silicon dioxide 10.0
Croscarmellose sodium 10.0
Film coating composition
Hydroxypropyl methylcellulose (E-15) 12.0
Polyethylene glycol 400 (PEG 400) 2.4
Iron oxide red 0.75
Iron oxide yellow 0.50
Titanium dioxide 0.25
Isopropyl alcohol q.s. (lost in processing)
Dichloromethane q.s. (lost in processing)
Procedure:
1) Extract, microcrystalline cellulose, mannitol, croscarmellose sodium and lactose are sifted and mixed together.
2) The material of step 1 is compacted.
3) The compacts of step 2 are passed through sieve and mixed.
4) Talc, colloidal silicon dioxide and croscarmellose sodium are passed through fine sieve and mixed together.
5) The material of step 3 is mixed with material of step 4.
6) The material of step 5 is compressed into tablets at an average weight of 400 mg ± 2%.
7) Hydroxypropyl methylcellulose is dispersed in a mixture of isopropyl alcohol and dichloromethane with continuous mixing in homogenizer.
8) PEG 400 is added to the above solution of step 7 and mixed.
9) Iron oxide red, iron oxide yellow and titanium dioxide are passed through fine sieve and mixed.
10) The material of step 9 is added to material of step 8 and mixed for 30 minutes.
11) The core tablets are charged into the coating pan and coated with the coating solution of step 10 till an average tablet weight gain of ~3% is achieved.
12) The tablets are dried and packed in air-tight packages.

CREAM COMPOSITIONS
EXAMPLE 14
Ingredient mg/gm
Purified euphorbia extract 10.0
Propylene glycol 50.0
Titanium dioxide 10.0
Stearic acid 130.0
Cetyl alcohol 10.0
Isopropyl myristate 60.0
Sorbitan stearate 20.0
Methyl paraben 1.5
Propyl paraben 0.3
Com oil 50.0
Glycerin 50.0
Sorbitol solution 30.0
VeegumHV 10.0
Sodium CMC 3.0
Tween 80 15.0
Purified water 9.8
Procedure:
1) Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; the mixture heated to 55-60°C; titanium dioxide is added to it and stirred well.
2) Stearic acid, cetyl alcohol, isopropyl myristate, sorbitan stearate, and corn oil are heated to 70°-75°C.
3) In another vessel, sorbitol solution and Tween 80 are taken.
4) Veegum HV is separately hydrated in the water.
5) Sodium carboxymethyl cellulose (sodium CMC) is separately hydrated in glycerin.
6) The material of step 4 and step 5 are added to the material of step 3 and heated to 70°-75°C.
7) The material of step 2 and step 6 are mixed and cooled.
8) When the material of step 7 attains a temperature of 50°-55°C, the material of step 1 is added to it.

9) The mixture is allowed to cool to room temperature to obtain the cream.
EXAMPLE 15
Ingredient mg/gm
Purified euphorbia extract 10.0
Propylene glycol 50.0
Titanium dioxide 10.0
Hard paraffin 60.0
Liquid paraffin 10.0
Isopropyl myristate 30.0
Span 60 20.0
Methyl paraben 1.5
Propyl paraben 0.3
Corn Oil 20.0
Glycerin 80.0
Sorbitol solution 50.0
Veegum HV 20.0
Tween 80 15.0
Purified water 9.8
Procedure:
1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; the mixture heated to 55-60°C; titanium dioxide is added to it and stirred well.
2. Hard paraffin, liquid paraffin, isopropyl myristate, Span 60, and Corn Oil are heated to 70°-75°C.
3. Veegum HV is hydrated in purified water; glycerin, Tween 80, and sorbitol is added to it; and the mixture is heated to 70°-75°C.
4. The material of step 2 is added to the material of step 3 with stirring and the mixture is allowed to cool to 55°-60°C.
5. The material of step 1 is added to the material of step 4, stirred, and allowed to cool to room temperature to obtain the cream.

EXAMPLE 16
Ingredient mg/gm
Purified euphorbia extract 10.0
Propylene glycol 50.0
Titanium dioxide 10.0
Glyceryl monostearate 90.0
Hydrogenated lanolin 30.0
Com oil 40.0
Simethicone 1.5
Span 60 20.0
Purified water 9.8
Hydroxyethyl cellulose 20.0
Glycerin 50.0
Sorbitol 30.0
Sodium CMC 1.5
Propyl paraben 0.3
Methyl paraben 1.5
Tween 80 15.0
Purified water 9.8
Procedure:
1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; titanium dioxide is added to it and stirred well.
2. Glyceryl monostearate, hydrogenated lanolin, corn oil, simethicane, and Span 60 are taken.
3. In cool purified water, hydroxyethyl cellulose is dissolved; sorbitol and Tween 80 is added to it and the mixture is heated to 70-75°C.
4. Separately sodium carboxymethyl cellulose (sodium CMC) is dispersed in glycerin and added to the material of step 3.
5. The material of step 2 is added to the material of step 3 and allowed to cool with stirring.
6. When a temperature of 50-55°C is attained, the material of step 1 is added, stirred, and allowed to cool to room temperature to obtain the cream.

EXAMPLE 17
Ingredient mg/gm
Purified euphorbia extract 10.0
Beeswax 50.0
Liquid paraffin 60.0
Com oil 25.0
Stearic acid 110.0
Cetyl alcohol 10.0
Titanium dioxide 10.0
Propylene glycol 50.0
Methyl paraben 1.5
Propyl paraben 0.3
Glycerin 50.0
Sorbitol Solution 30.0
Tween80 15.0
Purified water 9.8
Procedure:
1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; titanium dioxide is added to it and stirred well.
2. Beeswax, liquid paraffin, corn oil, stearic acid and cetyl alcohol are heated to 70-75°C.
3. Glycerin, sorbitol and Tween 80 is added to purified water and heated to 70°-75°C.
4. The material of step 2 is added to the material of step 3 and stirred.
5. The material of step 1 is added to the material of step 4 and allowed to cool to room temperature to obtain the cream.
EXAMPLE 18
Ingredient mg/gm
Purified euphorbia extract 10.0
Propylene glycol 50.0
Titanium dioxide 10.0
Stearic acid 70.0
Simethicone 1.0

Glyceryl monostearate 60.0
Cetosteryl alcohol 20.0
Cetyl alcohol 10.0
Sorbitan stearate 20.0
Methyl paraben 1.5
Propyl paraben 0.3
Glycerin 50.0
Sorbitol 30.0
Tween 80 15.0
Xanthangum 10.0
Purified water 9.8
Procedure:
1. Purified Euphorbia extract, methyl paraben and propyl paraben are dissolved in propylene glycol; titanium dioxide is added to it and stirred well.
2. Stearic acid, simethicone, glyceryl monostearate, cetosteryl alcohol, cetyl alcohol, and sorbitan stearate are heated to 70°-75°C.
3. Glycerin, sorbitol, Tween 80 and purified water are heated to 75°-75°C.
4. Xanthum gum is dispersed in glycerin and added to the material of step 3.
5. The material of step 2 is added to the material of step 4 and allowed to cool.
6. The material of step 1 is added to the material of step 5 and allowed to cool to room temperature to obtain the cream.
SUPPOSITORY COMPOSITIONS
EXAMPLE 19
Ingredient gm/10 units
Purified euphorbia extract 0.50
Polyethylene glycol 4000 (PEG 4000) 3.56
Polyethylene glycol 1000 (PEG 1000) 12.46
Polyethylene glycol 400 (PEG 400) 1.78
Propylene glycol 1.50
Glycerin 0.20
Procedure:

1) PEG 4000, PEG 1000 and PEG 400 are melted together and mixed well.
2) Euphorbia extract is dissolved in propylene glycol at 40-45°C with constant stirring.
3) The material of step 2 is added to the material of step 1 and mixed well.
4) The material of step 3 is poured into suppository moulds and cooled.
5) Suppositories thus formed are removed from moulds and packed suitably.
EXAMPLE 20
Ingredient gm/l0 units
Purified euphorbia extract 0.5
Propylene glycol 4.5
Emulsifying wax 9.0
Beeswax 4.0
Span 80 2.0
Procedure:
1) Emulsifying wax and beeswax are melted together and mixed.
2) Span 80 is added to the material of step 1 and mixed.
3) Euphorbia extract is dissolved in propylene glycol at 40-45°C with constant stirring.
4) The material of step 3 is added to the material of step 2 and mixed well.
5) The material of step 4 is poured into suppository moulds and cooled.
6) Suppositories thus formed are removed from moulds and packed suitably.
EXAMPLE 21
Ingredient gm/l0 units
Purified euphorbia extract 0.5
Propylene glycol 1.5
Witepsol-45 16.0
Cetyl alcohol 1.0
Beeswax 1.0
Procedure:
1) Cetyl alcohol, beeswax and Witepsol-45 are melted together.
2) Euphorbia extract is dissolved in propylene glycol at 40-45°C with const
3) The material of step 2 is added to the material of step 1 and mixed well.

4) The material of step 3 is poured into suppository moulds and cooled.
5) Suppositories thus formed are removed from moulds and packed suitably.
EVALUATION OF CLINICAL EFFICACY OF CAPSULES AND CREAM
The effective dose of extract of Euphorbia prostrata in nociceptive and inflammatory animal models varied from 5-20 mg/kg in mice and rats. Moreover, the maximum tolerable dose is more than 2000 mg/kg in mice and rats. Based on body surface area to body weight ratios, the expected dose of extract of Euphorbia prostrata for human studies could be in between 50 -200 mg for 60 kg human being (Paget and Barnes, 1964; Freireich et al., 1966). It is observed that the maximum human therapeutic dose (200 mg for 60 kg human being) is approximately 57 and 112 times less than the maximum dose employed in the acute toxicity studies in mice and rats respectively calculated based on body surface area to body weight ratios.
Results of the clinical trials conducted at RML and LNJP hospitals, Delhi (India)
The optimal dose, efficacy, safety and patient tolerability of 50 and 100 mg capsule formulations of extract of Euphorbia prostrata in hemorrhoidal attacks was evaluated in a double blind, placebo controlled, prospective, comparative and a randomized study. The duration of study was 8 months and protocol therapy was for 10 days.
A total of 125 patients entered the study, out of which 72 patients suffered from degree I hemorrhoids and 53 patients suffered from degree II hemorrhoids. The patients in each category were randomized into 3 treatment groups i.e. TDA, TDB and TDC (i.e. 50 mg, 100 mg and placebo capsules). All patients were evaluated on day 5 and day 10 of starting therapy. A follow up of 3 months was done.
The clinical examination was carried out to score the signs and symptoms i.e. proctorrhagia, anal discomfort, pain, anal discharge and proctitis at Day 0, Day 5 and Day 10. The degree of improvement on individual clinical parameters was also assessed from day 0, Day 5 and Day 10. The number of episodes of bleeding with bowel action and utilization of analgesics and topical medication as rescue medication was also assessed at Day 0, Day 5, and Day 10.
For statistical description, all patients were included in "Intent to treaf analysis. Kruskal Wallis test and Wilcoxan signed rank test for qualitative variables and paired t-test and one¬way ANOVA for quantitative analysis were applied.

The study demonstrated that 100 mg capsule of extract of Euphorbia prostrata (TDB) and 50 mg capsule of extract of Euphorbia prostrata (TDA) was generally more effective than placebo (TDC) group in all the efficacy parameters of hemorrhoids.
All the groups tolerated the drugs well and showed minimal side effects. All the laboratory parameters were normal at baseline as well as at the end of the therapy in all the 3 treatment groups.
Previous studies have demonstrated the efficacy and safety of extract of Euphorbia prostrata in the treatment of hemorrhoids in an uncontrolled fashion. In this study, extract of Euphorbia prostrata in two doses i.e. 50 and 100 mg showed good efficacy in treatment of hemorrhoids. However clinically, TDB group (100 mg capsule) showed better results in overall therapeutic evaluation.
In Degree I hemorrhoids, certain parameters in TDA group showed better results. From the analysis it was found that out of the three treatment groups, maximum number of patients in TDB group underwent 5-day therapy. The prolonged 10-day therapy in TDA group might attribute to the better response in some parameters. However, at day 5, in few evaluation parameters i.e., and discomfort and proctorrhagia, complete recovery was found in maximum number of patients in TDB group.
When the assessment on the degree of improvement in overall signs and symptoms of hemorrhoidal attacks was done, highest number of patients in TDB group showed substantial improvement at both assessment day i.e. Day 5 and Day 10. Clinically TDB group showed the better decrease in bleeding episodes at both Day 5 and Day 10. At 3 months follow up; both treatment groups i.e. TDA and TDB groups were found to be quite effective in terms of non-reoccurrence of bleeding.
It was found that although bleeding reoccurred in slightly more number of patients in TDB group, no treatment was needed in highest number of patients in TDB than TDA group. It
Also, at Day 5, TDB proved to be a better drug in bringing about complete disappearance of signs and symptoms of hemorrhoidal attacks. The better results shown by TDB group at Day 5 than at day 10 may be attributed to the fact that of all the treatment groups, highest number of patients in TDB groups underwent 5-day therapy and did not require prolonged therapy of 10 days. At 3 months follow up analysis; TDB was found to be better in all the aspects.

The use of rescue medication in Degree I and Degree II hemorrhoids was seen in lesser number of patients in TDB group at the end of therapy i.e. Day 10. The impact of rescue medication might also explain some better results seen with lesser dose of 50 mg (TDA) as compared to high dose 100 mg (TDB) in few parameters.

We claim:
1. A process for the preparation of an extract of the plant Euphorbia prostrata used in the
preparation of a pharmaceutical composition for the treatment of anorectal or colonic
disease such as hemorrhoids, fissures, cracks, fistulas, abscesses and inflammatory
bowel disease comprising the extract from 0.1% to 99% by weight which comprises
flavonoids and phenolic compounds, wherein the flavonoids are apigenin-7-glycoside,
1 - 4% by weight; luteolin-7-glycoside, 0.3 - 2% by weight; and apigenin, luteolin and
quercetin, 0.001 - 0.3% by weight; and wherein the phenolic compounds are ellagic
acid, 1-15% by weight; gallic acid, 1 - 12% by weight and tannins, 1 - 10% by weight,
with pharmaceutically acceptable carrier(s)/base(s) as herein described, optionally
with additional therapeutic agent(s) as herein described, comprising of the following
steps:
h. drying the plant Euphorbia prostrata under controlled conditions of temperature and humidity,
i. making a powder from the dried plant.
j. extracting the dry course powder with a polar solvent repetitively to form an extract,
k. distilling the extract,
I. washing the concentrated extract with a non-polar organic solvent,
m. optionally re-extracting the washed polar extract in a medium polarity organic solvent, distilling the extract followed by dehydrating the extract, and
n. drying the extract to produce the desired pharmaceutically acceptable extract
capable of being used alongwith pharmaceutically acceptable
carrier(s)/base(s).
2. A pharmaceutical composition comprising the extract as prepared in claim 1.
3. The pharmaceutical composition as claimed in claim 2, wherein the extract comprises apigenin-7-glycoside, 2.5 - 3.5% by weight; luteolin-7-glycoside, 0.5 - 1.5% by weight; apigenin, luteolin and quercetin, 0. 05 - 0.2% by weight; ellagic acid, 4 - 15% by weight; gallic acid, 4 - 12%) by weight; and tannins 3 - 8%) by weight.

4. The pharmaceutical composition as claimed in claim 1, wherein the composition is in the form of a cream, ointment, suppository, oral hard gelatin capsules, soft gelatin capsules and tablets (coated and uncoated).
5. A process for the preparation of an extract of the plant Euphorbia prostrata used in the preparation of a pharmaceutical composition for the treatment of anorectal or colonic disease pharmaceutical composition substantially as herein described and illustrated by the examples.

Documents:

05-DEL-2004-Abstract-(18-08-2008).pdf

05-DEL-2004-Abstract-(31-07-2008).pdf

05-DEL-2004-Claims-(18-08-2008).pdf

05-DEL-2004-Claims-(31-07-2008).pdf

05-DEL-2004-Correspondence-Others-(18-08-2008).pdf

05-DEL-2004-Correspondence-Others-(31-07-2008).pdf

05-DEL-2004-Description (Complete)-(18-08-2008).pdf

05-DEL-2004-Drawings-(18-08-2008).pdf

05-DEL-2004-Drawings-(31-07-2008).pdf

05-DEL-2004-Form-1-(18-08-2008).pdf

05-DEL-2004-Form-2-(18-08-2008).pdf

05-DEL-2004-Form-2-(31-07-2008).pdf

05-DEL-2004-Form-3-(18-08-2008).pdf

05-DEL-2004-Petition-137-(18-08-2008).pdf

5-del-2004-abstract.pdf

5-del-2004-claims.pdf

5-del-2004-correspondence-others.pdf

5-del-2004-correspondence-po.pdf

5-del-2004-description (complete)-31-07-2008.pdf

5-del-2004-description (complete).pdf

5-del-2004-drawings.pdf

5-del-2004-form-1.pdf

5-del-2004-form-13.pdf

5-del-2004-form-19.pdf

5-del-2004-form-2.pdf

5-del-2004-form-26.pdf

5-del-2004-form-3.pdf

5-del-2004-pct-316.pdf

« Previous Patent

Next Patent »

Patent Number

227729

Indian Patent Application Number

5/DEL/2004

PG Journal Number

05/2009

Publication Date

30-Jan-2009

Grant Date

19-Jan-2009

Date of Filing

02-Jan-2004

Name of Patentee

PANACEA BIOTEC LIMITED

Applicant Address

B-1 EXTN.A/27, MOHAN CO-OPERATIVE, INDL. ESTATE, MATHURA ROAD, NEW DELHI-110 044, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	SUKHJIT SINGH	G.M RESEARCH DEVELOPMENT PANACEA BIOTEC LIMITED, B-1, EXTN. A/27 MOHAN CO-OPERATIVE, INDL. ESTATE, MATHURA ROAD, NEW DELHI-110044, INDIAN
2	RAJESH JAIN	JOINT MANAGING DIRECTOR PANACEA BIOTEC LIMITED, B-1, EXTN. A/27 MOHAN CO-OPERATIVE, INDL. ESTATE, MATHURA ROAD, NEW DELHI-110044, INDIAN
3	DR. ANIRUDH DUTTA	SCIENTIST PANACEA BIOTEC LIMITED., B-1, EXTN. A/27 MOHAN CO-OPERATIVE, INDL. ESTATE, MATHURA ROAD, NEW DELHI-110044, INDIAN
4	DR. K.C.JINDAL	VICE PRESIDENT PANACEA BIOTEC LIMITED., B-1, EXTN. A/27 MOHAN CO-OPERATIVE, INDL. ESTATE, MATHURA ROAD, NEW DELHI-110044, INDIAN

PCT International Classification Number

A61K 35/78

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA