Disclosed is an osmotic pharmaceutical delivery system comprising (a) a
semi-permeable wall that maintains its integrity during pharmaceutical
delivery and which has at least one passage therethrough; (b) a single,
homogeneous composition within said wall, which composition consists
essentially of (i) a pharmaceutically active agent, (ii) at least one
non-swelling solubilizing agent which enhances the solubility of the
pharmaceutically active agent; (iii) at least one non-swelling osmotic
agent and (iv) a non-swelling wicking agent dispersed throughout the
composition which enhances the surface area contact of the pharmaceutical
agent with the incoming aqueous fluid.
