Blood samples were collected in heparinized tubes either by direct venipuncture or via a catheter inserted into the
antecubital vein, immediately prior to receiving each formulation, and at 2, 4, 6, 8 and 24 h after administration
of the dose. Subjects were instructed to fast overnight prior to each dose (administered at 8 a.m.) and for the first 4 h following the administration of each preparation.