Abstract: The present invention provides a gastric retention controlled drug delivery system comprising: (a) a controlled release core comprising a drug, a highly swellable polymer and a gas generating agent, said core being capable of swelling and achieving floatation rapidly while maintaining its physical integrity in gastrointestinal fluids for prolonged periods, and (b) a rapidly releasing coat composition comprising the same drug as in the core and pharmaceutically acceptable excipients, wherein the coating composition surrounds the core such that the system provides a biphasic release of the drug in gastrointestinal fluids.

Abstract: The present invention provides a gastric retention controlled drug delivery system comprising: (a) a controlled release core comprising a drug, a highly swellable polymer and a gas generating agent, said core being capable of swelling and achieving floatation rapidly while maintaining its physical integrity in gastrointestinal fluids for prolonged periods, and (b) a rapidly releasing coat composition comprising the same drug as in the core and pharmaceutically acceptable excipients, wherein the coating composition surrounds the core such that the system provides a biphasic release of the drug in gastrointestinal fluids.

Abstract: The present invention provides a gastric retention controlled drug delivery system comprising: (a) a controlled release core comprising a drug, a highly swellable polymer and a gas generating agent, said core being capable of swelling and achieving floatation rapidly while maintaining its physical integrity in gastrointestinal fluids for prolonged periods, and (b) a rapidly releasing coat composition comprising the same drug as in the core and pharmaceutically acceptable excipients, wherein the coating composition surrounds the core such that the system provides a biphasic release of the drug in gastrointestinal fluids.

Abstract: The present invention provides coated sustained release tablets of a hygroscopic compound for once-a-day therapy, said tablets having a moderate weight and volume and comprising—

Abstract: The oral controlled drug delivery system of the present invention comprises carbamazepine and one or more hydrophobic polymers in homogenous admixture, wherein the system does not comprise any means capable of preventing the conversion of carbamazepine to its dihydrate form. The present invention provides an oral controlled drug delivery system for carbamazepine having a desirable controlled rate of delivery of carbamazepine, which system is simple, uncomplicated and easy to manufacture.