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Abstract
The effect of different types and concentrations of some starches as disintegrants on the properties of aspirin tablets as a model for double compressed tablets was studied. The formulated tablets were evaluated using the U.S.P. official tests and some other selected nonofficial tests. These tests include: uniformity of weight, uniformity of content, disintegration, dissolution, hardness, friability and thickness. Maize starch was found to be the most suitable disintegrant for the formulation of double compressed tablets while rice starch was the worst disintegrant, in this study, as it significantly increased the hardness of tablets and showed a prolonged disintegration time as well as a poor dissolution rate. increasing the starch content of tablets resulted in a marked increase in their dissolution rate.