| abstract |
A gastric retention drug delivery system is provided. Said system comprises a hollow capsule and a layer containing drug which surrounds the hollow capsule. Said hollow capsule preferably has a single chamber structure. The size in maximal diameter direction of said hollow is preferably 0.5-3.5cm. The gastric retention drug delivery system preferably contains an isolating layer and/or waterproof layer between the hollow capsule and the layer containing drug. |