Patent ID: 9029416
Filing Date: 2015-05-12
Classification: A61K

Abstract:
1. An osmotic dosage form comprising: a capsule-shaped longitudinally compressed tablet core containing a plurality of layers wherein drug is contained in at least one layer and at least one other layer comprises a suitable fluid-expandable polymer, and wherein said drug is a CNS-stimulant drug selected from the group consisting of methylphenidate, d-threo-methylphenidate, amphetamine, dextroamphetamine, methamphetamine, and pemoline; a semipermeable wall surrounding said longitudinally compressed tablet core to thereby form a compartment having an osmotic gradient to drive fluid from an external fluid environment contacting said semipermeable wall into said compartment; and an orifice formed through said semipermeable wall and into said longitudinally compressed tablet core to permit drug to be released from within said compartment into said external fluid environment.