An Overview on Classification, Mechanism of Extended Release Drug Delivery of Oral Formulations

ER is defined as a dosage form designed to release the medication in controlled manner during an extended period of time, at predetermined rate, duration, and location following administration. At steady state, rate absorption approximately equivalent elimination due metabolism excretion. (extended release) tablets shows better patient compliance through reduction frequency dose administration also maintain therapeutic concentration over long time it help reduce side effect drug effect. The tablet very helpful treat chronic diseases. objectives this review are discuss their advantages, classification mechanism systems.