| abstract |
The present invention relates to a gastric retention drug release system comprising a hollow capsule and a drug-containing layer surrounding the hollow capsule. The hollow capsule preferably has a single chamber structure. The dimension in the maximum diameter direction of the hollow capsule is preferably 0.5 to 3.5 cm. The gastric retention drug release system preferably includes an isolation layer and / or a waterproof layer between the hollow capsule and the drug-containing layer. |