Entrapment efficiency

Controlled topical release drug delivery system for Fluconazole  is potentially useful in improving drug deposition in the skin and reducing the incidence of adverse side effects. The purpose of the present experiment was to produce a topical gel system for the delivery of . Drug loaded microsponges (1–10) were formulated by an emulsion solvent diffusion method. Optimization of the microsponges was selected by drug loading efficiency. The optimized microsponges was formulated as topical gel and evaluated. The in vitro drug release, ex vivo drug deposition, primary skin irritancy study and in vivo antibacterial activity of  loaded formulations were studied. The spherical and porous microparticles were obtained. Moreover, the optimized microsponge possess particle size, entrapment efficiency and production yield and of 84.49 µm, 72.21% and 39.40% respectively. Microsponge loaded gels indicated controlled release, no irritancy to rat skin and antifungal activity. An in vivo skin deposition study proved three fold higher retention in the stratum corneum layer as compared with plain  gel. Microsponges-based gel formulations showed prolonged efficacy in a rat surgical wound model infected with Candida albicans. These results suggest that was stable in topical formulations and amplifying retention in the skin, indicating better potential of the delivery system for treatment of primary and secondary skin infections. Keywords: Microsponges, Particle size, Entrapment efficiency, Primary skin irritancy, in vivo skin deposition Candida albicans.  

This investigation deals with the formulation of sustained release niosome based system of silver sulfadiazine for the treatment of burn and thereby decreasing the dosing frequency which is really important for severe burn patient as every reapplication is very painful to them. In this investigation, the effect of different processing variables on entrapment efficiency of drug was evaluated. The vesicle size, photomicroscopy, in vitro release, scanning electron microscopy, stability and in vitro antimicrobial activity of niosomal vesicles formed were also characterized. Niosomes were developed from span 60 and cholesterol in different molar ratio by ether injection, thin film hydration and non solvent methods. Results indicated that the niosomes manufactured with span 60 and cholesterol in 50:50 molar ratio using 100mg of drug by thin film hydration method gives highest entrapment of 92.11%. The method of preparation and contents of cholesterol as well as drug were found to affect the entrapment. The optimized niosomal formulation exhibited significantly retarded in vitro release of 98.04% over 28 hours by a higuchi controlled mechanism. The in vitro antimicrobial study using Staphylococcus aureus revealed that niosomal formulation of silver sulfadiazine shows better zone of inhibition (18mm) in comparison to conventional dosage form (17mm). In conclusion this study showed that the niosomal formulation can be used as promising sustained release approach for the topical delivery of silver sulfadiazine in the treatment of burn.

Mucoadhesive microspheres of metformin hydrochloride (HCL) were successfully developed by emulsification /evaporation techniques to achieve the optimum effect for prolong duration of time. All the prepared formulation was subjected to different type of evaluation like, practical yield, particle size, entrapment efficiency, in vitro release study, in-vitro kinetic study and percentage of mucoadhesion. Particle size was determined by image microscope and the average particle size of prepared formulation was found in the range of 90.32±1.8  to 154.55±0.20 μm for all batches .Cumulative percent drug release was found to be maximum for F4 and F9 (90.88±0.59 and92.10±0.414). Formulation F1,F2,F3,F4,F5,F7,F9 show Zero order releases profile and other formulations like, F6 show Hixon, F8 show Higuchi , F 10 show First order kinetic. All the batches showed good in vitro mucoadhesive property. It was also found that the prepared formulations not showing any interaction .The satisfactory result of different evaluatory parameters, reflect that the experimental study will prove to be a effective delivery system.