Design and in Vitro Evaluation of Sustained Release Dosage Forms

Download or read book Design and in Vitro Evaluation of Sustained Release Dosage Forms written by Suneel Kumar Vasireddy and published by LAP Lambert Academic Publishing. This book was released on 2012-08-01 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metformin matrix and gastro retentive tablets formulations were prepared with different compositions. Finally, one optimized formula for each, matrix and gastro retentive, were selected and studied in detail. The effect of formulation variables namely, process of manufacturing, different excipients, different polymers, and concentration of polymer were studied. Metformin release was inversely proportional to the polymer concentration. Drug release from the developed formulations was independent of pH of the release medium but dependent on the agitational intensity, hardness of tablet, and surface area of tablet. Metformin release from both developed matrix and gastro retentive formulations follows first order. The manufacturing procedure was found to be reproducible and formulations were stable after one month of accelerated stability studies.