Adizem XL 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 XL is specifically formulated as an extended-release capsule, designed to release the medication slowly over time to provide a 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 XL helps to prevent strokes, heart attacks, and kidney problems. It is important to follow the prescribed dosage and consult a healthcare provider for any concerns or side effects.