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Preparation, Characterization and in Vitro Evaluation of Repaglinide Binary Solid Dispersions with Hydrophilic Polymers

In the present study, the practically insoluble drug, repaglinide, employs formation of solid dispersions as a means to enhance the dissolution rate, thus enhancing bioavailability of repaglinide, typically employs hydrophilic polymer systems (Lutrol F127, PEG 6000 and Gelucire 44/14) with different ratios prepared using the melting, solvent and melting solvent methods. The formulations were evaluated for various in vitro parameters (Drug content, Drug release, FTIR, DSC, and XRD). Phase-solubility studies revealed AL type of curves for each carrier, indicating linear increase in drug solubility with carrier concentration. Good uniformity of drug content was observed with all formulations and ranged from 95.52 and 99.0%. All the solid dispersions showed dissolution improvement compare to pure drug. Solid state characterization of the drug?polymer binary systems using XRD, DSC and FTIR techniques revealed distinct loss of drug crystallinity in the formulation, ostensibly accounting for enhancement in dissolution rate. The stability studies indicated, the best formulation LMS17 was stable for period of 6 months. The solid dispersion techniques provide a promising way to increase the solubility and dissolution rate of poorly soluble drugs.

Author(s): Patel Manvi, Pandya Narendra, V.H.Bhaskar

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