FLOATING OSMOTIC DEVICE FOR CONTROLLED RELEASE DRUG DELIVERY

摘要

The present invention provides a novel floating osmotic device that is capable of delivering a first active agent in an outer coat immediately followed by continuous controlled delivery of second active agent from the osmotic core while the dosage form floats in the fluid of the environment. The floating osmotic device has of a compressed core containing active agent, a semipermeable membrane surrounding the core that is permeable to surrounding fluid and impermeable to the active agent, and an outer coating of a gas generating ingredient, a gelling agent, and a second active agent. Particular embodiments of the invention provide floating osmotic devices in which all tow active agents are similar or dissimilar.