IVIVC plot for risperidone tablet, reference (a) and test (b); in phosphate buffer pH 4, 50 rpm (I); in phosphate buffer pH 1.2, 50 rpm (II); in phosphate buffer pH 6.8, 50 rpm (III); in water, 50 rpm (IV); in phosphate buffer pH 6.8, 100 rpm (V). In vitro–in vivo correlation