Abstract
An in vitro dissolution study has been carried out with a USP rotating paddle apparatus using the stepwise pH change method. The dissolution kinetics of two different matrix-type aminophylline slow-release (SR) tablets were compared. Both aminophylline SR tablets show similar release rates and slow release behavior. The bioavailability of these two aminophylline SR tablets was also evaluated in eight healthy male Chinese volunteers and correlated with in vitro dissolution results by moment analysis. The preliminary results suggest that there is no evidence indicating that the two different matrix types of aminophylline SR tablets are not bioequivalent, and a good in vitro–in vivo correlation for these aminophylline SR tablets may therefore be presumed.
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