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What Does Extended Release Mean in Medications? Over-the-counter pills come in many formulas, such as time release, controlled release, extended release, delayed release or sustained release. How does time release work, and what are the advantages and disadvantages to it? What should you know before choosing a standard or time release formula?
A: Diltiazem ER (extended-release) is in a drug class called calcium channel blockers. Diltiazem ER is used alone or combined with other medications to treat high blood pressure. Diltiazem ER is also used to manage angina (chest pain).