Pharmaceutical composition comprising tetrabenazine

摘要

A controlled release pharmaceutical composition in unit dosage form comprising tetrabenazine as the sole therapeutic agent and a release-retarding agent. The composition has a long half-life of some 13-15 hours. The release-retardig agent is a cellulose derivative such as hydroxypropylmethyl cellulose (HPMC) or hydroxypropyl cellulose (HPC).