PVP-K30.

In the present study, Solid Dispersion of Propranolol Hydrochloride were prepared using solvent evaporation technique using PEG 4000, PVP K-30 and PVA. However absolute bioavailability of Propranololo Hydrochloride is about 30% . To increase the solubility, solid dispersion was prepared. Preliminary solubility analysis was carried out for the selection of carriers and solid dispersion was prepared with PVA, PEG 4000, PVP-K30. These solid dispersions were analyzed for the solubility and In-vitro dissolution profile, solid dispersion of drug with PEG 4000 had shown enhanced solubility with improved dissolution rate. Further FTIR, DSC, SEM studies were carried out. Solid dispersion prepared with PEG 4000 shows the presence of amorphous form confirmed by the characterization study .The study also shows that dissolution rate of Propranolol Hydrochloride can be enhanced to considerable extent by solid dispersion technique with PEG 4000.

  The aim of the present work was to improve the solubility and dissolution rate of simvastatin, a drug used for the treatment of hyperlipidemia. Simvastatin is a selective competitive inhibitor of HMG CoA reductase. However its absolute bioavailability is 5 %. To increase the solubility of drug solid dispersion was prepared. Solid dispersion preliminary solubility analysis was carried out for the selection of carriers and solid dispersion was prepared with PEG 4000 and PVP-K30. These solid dispersions were analyzed for the solubility and In-vitro dissolution profile, solid dispersion of drug with PEG 4000 had shown enhanced solubility with improved dissolution rate. Further FTIR, X-Ray studies were carried out. Solid dispersion prepared with PEG 4000 in 1:5 ratio shows the presence of amorphous form confirmed by the characterization study .The study also shows the that dissolution rate of Simvastatin can be enhanced to considerable extent by solid dispersion technique with PEG4000. Key words: Hyperlipidemia, solid dispersion, PEG4000, PVP-K30.