Abstract
AbstractFive different hydrochlorothiazide (50mg. per capsule) capsule formulations were prepared with one of the following diluents: corn starch, dibasic calcium phosphate, lactose, microcrystalllne cellulose, or sodium carboxymethyl starch. A comparative dissolution study was conducted using the USP procedure. Significant differences (p = 0.05) were found among the formulations relative to in vitro dissolution rates over a two-hour sampling period. The formulations prepared with lactose consistently ranked near the top (Newman-Keuls multiple range test) while the formulation prepared with sodium carboxymethyl starch ranked last at each sampling time except 3 min.
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