Emphasis on Controlled Drug Delivery System-A Review

Controlled release drug delivery systems are those dosage formulations designed to release an active ingredient at rates, which differ significantly from their corresponding conventional dosage forms. The controlled release drug delivery systems are aimed at controlling the rate of drug delivery, sustaining the duration of therapeutic activity and/or targeting the delivery of the drug to a tissue. Drug release from these systems should be at a desired rate, predictable and reproducible. The principal goal of sustained release dosage form is the improvement of drug therapy assessed by the relationship between advantages and disadvantages of sustained release dosage form.