Adizem SR is a brand name for a medication that contains diltiazem hydrochloride as its active ingredient. It belongs to a class of drugs known as calcium channel blockers, which work by relaxing the muscles of the heart and blood vessels. Adizem SR is specifically formulated as a sustained-release (SR) capsule, designed to release the medication gradually over time to provide a more consistent therapeutic effect. It is primarily used in the treatment of hypertension (high blood pressure) and angina pectoris (chest pain caused by reduced blood flow to the heart). By lowering blood pressure and improving blood flow, Adizem SR helps to reduce the risk of stroke, heart attack, and other heart-related complications. It is important to use this medication under the guidance of a healthcare professional, as it requires careful dosing and monitoring.