MICROWAVE INDUCED SOLUBILITY ENHANCEMENT OF POORLY WATER SOLUBLE DRUG SIMVASTATIN USING POLOXAMER 188 BY MICROWAVE IRRADIATION METHODAbstract
To increase the solubility of poorly water-soluble drug simvastatin using hydrophilic carrier poloxamer 188 using solid dispersion techniques by microwave irradiation method. The microwave irradiation technique was used to prepare solid dispersions in minimum time interval in different drug carrier ratios, i.e. 1:2, 1:5, 1:8 and was subjected to microwave for different times, i.e. 3 min, 5 min, and 7 min. Solid dispersions were characterized for drug content, percentage yield, saturation solubility studies, and in-vitro dissolution studies. A 32 full factorial design was selected to study the influence of the individual and combined effect of independent variables drug carrier ratio (X1) and microwave time (X2) on the dependent variables percent dissolution efficiency (% DE) at 60 min and percent yield. In this design, two factors were evaluated, each at three levels, and experimental trials is performed at all nine possible combinations. The optimized batch obtained using design expert was having drug carrier ratio of 1:5.75 and microwave time of 5.68 min.