CONTROLLED RELEASE ORAL DOSAGE FORMULATIONS COMPRISING A CORE AND ONE OR MORE BARRIER LAYERS

摘要

The invention provides controlled release oral dosage formulations containing one or more active agents, and methods of using same. In one aspect, the formulation is in the form of a trilayer tablet containing a core or central layer and one or more barrier layers. The core may contain one or more enteric materials or polymeric materials which modulates the release of the active agent.