Release Rate of Indomethacin from Coated Granules

Abstract
The purpose of this investigation was a study on sustained release coated granules manufactured by means of the air-suspension coating technique. The smoothed 12/20-mesh fractions of indomethacin granulation containing povidone as a binder were coated in a modified air-suspension coater with film of ethylcellulose-glyceryl monostea-rate mixture at various percents by weight of coat. The kinetics of drug release was determined and appears to conform to the first-order fashion. The relationship between the coating weight and the first-order release rate constant was developed and found to be in the form of exponential function.

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