Development and evaluation of glyburide fast dissolving tablets using solid dispersion technique

Drug Development and Industrial Pharmacy
Maurizio ValleriR Ballerini

Abstract

Glyburide is a poorly water-soluble oral hypoglycemic agent, with problems of variable bioavailability and bio-inequivalence related to its poor water-solubility. This work investigated the possibility of developing glyburide tablets, allowing fast, reproducible, and complete drug dissolution, by using drug solid dispersion in polyethylene glycol. Phase-solubility studies were performed to investigate the drug-carrier interactions in solution, whereas differential scanning calorimetry, X-ray powder diffraction, and infrared spectroscopy were used to characterize the solid state of solid dispersions. The effects of several variables related to both solid dispersion preparation (cofusion or coevaporation technique, drug-to-carrier ratio, polyethylene glycol molecular weight) and tablet production (direct compression or previous wet-granulation, tablet hardness, drug, and solid dispersion particle size) on drug dissolution behavior were investigated. Tablets obtained by direct compression, with a hardness of 7-9 Kp, and containing larger sized solid dispersions (20-35 mesh, i.e., 850-500 microm) of micronized glyburide in polyethylene glycol 6000 prepared by the cofusion method gave the best results, with a 135% increase in drug d...Continue Reading

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