CONTROLLED RELEASE DRUG DELIVERY DEVICE

摘要

An oral drug delivery device for delivering a drug either intermittently or to a pre-selected region of the gastro-intestinal tract, particularly to the colon, consists o f an a solid core comprising an active agent coated with a delay jacket, then coated with a se mi- permeable membrane which is optionally drilled to provide a release orifice, and then optionally further coated with an enteric material. The device delivers substantially a ll of the active agent to the targeted site.