Formulation and Evaluation of Fusidic Acid Emulgel

Emulgel have emerged as one of the most interesting topical delivery system as it has dual control release system i.e gel and emulsion. Topical applications of drug offers many advantages for delivering drug directly to the site of action and deliver the drug for extended period of time at effected site. The major objective behind this formulation is to enhance topical delivery of hydrophobic drug (Fusidic acid) by formulating Fusidic acid emulgel by using carbopol 934 as gelling agent. In addition light liquid paraffin as oil, span 20 as emulsifier and propylene glycol as co-surfactant were selected for the preparation of emulgel. Fusidic acid is steroidal bacteriostatic agent produced from Fusidium coccineum fungus belongs to class of steroids but has no corticosteroids effect and which is useful for the treatment of number of infections. Fusidic acid binds to protein and ribosomes and inhibits bacterial protein synthesis. The prepared emulgel were evaluated for their physical appearance, pH determination, viscosity, spreadability, in-vitro drug release, antimicrobial activity, skin irritation study and stability. All the prepared emulgel showed acceptable physical properties. The best formulation E9 shows better drug release when compared to all formulation. Keywords: Emulgel, Carbopol 934, Topical formulation, Antimicrobial activity, optimization, Fusidic aci

Formulation and evaluation of in situ ophthalmic gel of loteprednol etabonate

The aim of present study was to prepared ocular in-situ gel to increase the residence time of drug in cornea for improvement of ocular bioavailability of drug. In situ gel of Loteprednol etabonate was prepared by using carobopol 940 and different grades of HPMC in different ratios by pH triggered method. The prepared in situ gels were evaluated for pH, drug content, viscosity, gelling time, gelling strength spreadability and sterility testing. In vitro drug release study was carried by using diffusion cell with dialysis membrane. The drug content and pH of the formulation were found to be satisfactory. The gelling strength was found to be in the range of 34 seconds to 91 seconds. The viscosity and spredability of the formulations were found to be satisfactory. Formulation F5 containing 0.3 % carobopol 940 and 0.6 % HPMC K4M showed highest drug release of 80.30 %. The developed formulations showed sustained release of drug up to 8 hrs. From in-vitro drug release studies, it could be concluded that the developed in-situ gelling systems were thus a better alternative to conventional eye drops

Formulation and Evaluation of Floating In-Situ Gel of Nicardipine Hydrochloride

The present research work aimed to formulate and evaluate a gastro retentive in situ gelling system of Nicardipine Hydrochloride using Sodium Alginate as gelling polymer, HPMC K100M as release retard polymer, calcium carbonate as a cross-linking agent, and tri-sodium citrate as fluidity enhancer agent to treat hypertension. The mechanism for the floatation was based on ionic cross-linking. Several evaluation tests were carried out for pre and final formulation evaluation. Based on the outcomes white-colored, viscous solution of uniform consistency was obtained. Batch B1 was very well prepared for the ability to control long-term drug release. The drug content was found to be > 97 %, the viscosities were in the acceptable range suitable for swallowing, and pH was found to be in the range of 7.33 – 7.68 which was compatible with oral digestion. Design expert 13 Software was used to derive results of interaction and responses based on the concentration of polymer and statistical analysis. The optimized formulation i.e., Batch B1 (0.6 % w/v and 0.5 % w/v HPMC K100M) showed a slow drug release of 96.44 % up to 12 hours. The best fit model for the drug release followed the Higuchi model which explained that the drug release occurred by the Fiskian mechanism i.e., a combination of both diffusion and erosion. The in-situ gel prepared can ultimately provide prolonged release, enhance the bioavailability of the drug and increase patient compliance. Keywords: - In situ gel, Ionic cross linking, Sodium alginate, HPMC K100M, Nicardipine Hydrochloride