Posted by admin on May 1, 2010 in |
Oral drug administration has been the predominant route for drug delivery due to the ease of administration, patient convenience and flexibility in formulations. Mucoadhesive tablets of Cephalexin monohydrate were prepared with an objective to increase the bioavailability by minimizing the first pass metabolism and also to reduce the frequency of administration. Carbopol 934p as a primary polymer and HPMC K15M, HPMC K4M, and HPMC K100M as secondary polymers in different proportions has been used to formulate the desired mucoadhesive formulation with other tablet excipients and lubricants to give good compressibility by dry granulation method. The tablets were characterized by weight variation, hardness, thickness, friability, swelling ability, dissolution profile, assay and mucoadhesive strength. The selected mucoadhesive formulation FC2 exhibited 99.51% of drug release in 24 hrs, the mucoadhesive strength was found to be 95.04 gm so it has enough strength to adhere on the mucosa for an extended period of time. Kinetic study has been studied for the selected formulation it follows zero order release and matches with Higuchi regression....
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Posted by admin on May 1, 2010 in |
Objective of the study was to assess the anticonvulsant activity of extracts of Hibiscus rosa sinesis in albino rats. Methods: The anticonvulsant activity of extracts of flowers of Hibiscus rosa sinesis in rats were assessed using maximum electroshock seizure (MES) test and isoniazid (INH) using albino rats. The time taken before the onset of clonic convulsions, the duration of colonic convulsions and mortality protection were recorded. Results: The alcoholic extract of Hibiscus rosa sinesis flowers decreased the duration of hindlimb extension; clonus and stupor phase of MES induced convulsions as compared to control. However, all the extracts of flowers of Hibiscus rosa sinesis Linn. did not show any significant anticonvulsant activity against INH induced seizures. Conclusion: The alcoholic extract of Hibiscus rosa sinesis inhibits MES -induced convulsions but not INH-induced convulsions in animal...
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Posted by admin on May 1, 2010 in |
The present study deals with evaluation of antioxidant, wound healing and anti-inflammatory activity of ethanolic extract of leaves of Ficus religiosa. The ethanolic extract prepared by maceration technique was subjected to screen for antioxidant activity using DPPH radical scavenging method and wound healing activity using incision, excision, histopathological and dead space wound model and the study was supported with evaluation of granuloma tissue to estimate hydroxyproline content and histopathological evaluation. The anti-inflammatory study was carried out by using carageenan induced rat paw odema method. The tested extract of different dilutions in range 200µg/ml to 1000 µg/ml shows activity in range of 6.34% to 13.35%. Significant increase in wound closure rate, skin breaking strength, granuloma breaking strength was observed. The hydroxyproline content was also increased with decrease in scar area. The initial healing action might be due to increased collagen deposition and better alignment, with the obtained results it can be concluded that Ficus religiosa extract has significant wound healing activity and initial healing may be due to presence of...
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Posted by admin on May 1, 2010 in |
A microwave assisted extraction technique was developed to optimize the extraction of mucilage from the fruits of Trichosenthes dioica plant. Materials and Methods: the plant has been extracted by conventional and microwave assisted methods for the isolation of mucilage. Results and Discussion: Microwave extraction at 320 W intensity and 20 min heating duration, 84.92% increase in the yield of mucilage while 52.06% and 38.09% increase in the yield at 640 W for 5 min and 160 W for 40 min respectively were obtained under microwave irradiation when compared to 1 h conventional heating method. The products obtained by both the methods were of similar nature both physically and chemically. Conclusion: The developed microwave procedure can be used successfully in commercial and routine laboratory isolation of...
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Posted by admin on May 1, 2010 in |
The present endeavour was directed towards fabrication of the novel colon drug delivery system of ketorolac tromethamine capsule. Hard gelatin Capsules were fabricated using combination of both microflora activated natural polysaccharide (guar gum) and pH-dependent polymer (cellulose acetate phthalate). In vitro drug release studies revealed that Ketorolac tromethamine granules bearing hard gelatin capsules coated with cellulose acetate phthalate released drug only at higher pH (6.8 PBS), in vitro drug release studies showed that capsules were retained in stomach pH (1.2 N HCl) with-out any drug release, whereas minimal amount of drug release in small intestine pH (7.4 PBS) and almost drug release showed in the colonic pH (6.8 PBS). The rate of drug release was observed fast with caecal content (4% w/w rat caecal) than the control medium. Hence 50% guar gum containing coated capsules may be potentially useful for delivery of ketorolac tromethamine for colon. The drug release follows case ІІ (non- fickian) diffusion control...
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