Gastro-retentive drug delivery system can retain the drug in the gastric region for several hours which enhances drug release and improves bioavailability. Atenolol, an antihypertensive drug has short half-life, limited bioavailability, highly unstable at basic pH and is extensively absorbed from the stomach. These features triggered the need of developing gastroretentive system. In the present study a superporous hydrogel was developed as a gastroretentive...