Studies on solubility of curcumin

Abstract

Curcumin is coming from the Curcuma longa which gives golden color and have the biological importance. As per the survey it is water insoluble, the poor solubility and wettability of curcumin leads to poor dissolution and hence shows poor bioavailability. The present study is aimed at increasing solubility of drug using solid dispersion technique. The solid binary systems were prepared using different drug: polymer ratio (1:1, 1:4 and 1:8) with polyethylene glycol 4000 and 6000 by different techniques like physical mixing, melting method and solvent evaporation method. PVP K 30 was also used as a polymer. The formulations were characterized by scanning electron microscopy, thin layer chromatograpy, compatibility study, diffraction study and in vitro dissolution rate studies. The solubility of drug increased linearly with the increase in polymer concentration. The solid dispersion of drug prepared by hot melt method demonstrated higher drug dissolution rates in comparison to solid dispersion prepared by physical mixtures, solvent evaporation method and pure curcumin.