Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
Regular Articles
Solubility, Dissolution Rate and Bioavailability Enhancement of Irbesartan by Solid Dispersion Technique
Rikisha Jaysukhbhai BoghraPranita Chandrakant KothawadeVeena Shailendra BelgamwarPankaj Padmakar NerkarAvinash Ramrao TekadeSanjay Javerilal Surana
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2011 Volume 59 Issue 4 Pages 438-441


The objective of present work was to enhance the solubility and bioavailability of poorly aqueous soluble drug Irbesartan (IBS). The solid dispersions were prepared by spray drying method using low viscosity grade HPMC E5LV. Prepared solid dispersions were characterized by dissolution study, fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and X-ray diffraction studies (XRD). Results of the SEM, DSC and XRD study showed the conversion of crystalline form of IBS to amorphous form. The dissolution rate was remarkably increased in case of solid dispersion compared to pure IBS. Solubility and stability of solid dispersion was increased due to surfactant and wetting property, slowing devitrification and having anti-plasticization effect of HPMC E5LV. In vivo studies were performed in healthy rabbits (New Zealand grey) and compared with plain IBS. Solid dispersions showed increase in relative bioavailability than the plain IBS suspension. In conclusion, the prepared solid dispersions showed remarkable increase in solubility, dissolution rate and hence bioavailabilty of poorly water soluble drug Irbesartan.

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© 2011 The Pharmaceutical Society of Japan
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