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Extended Release

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By: Tim Wright

Editor-in-Chief, Contract Pharma

Descriptive term for a dosage form that is deliberately modified to protract the release rate of the API compared to that observed for an immediate-release dosage form. The term is synonymous with controlled release, controlled delivery, sustained delivery, sustained release, long acting, or prolonged release and other terms. Many extended release dosage forms have a pattern of release that begins with a "burst effect" that mimics an immediate release followed by a slower release of the remaining API in the dosage form.

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