Dilzem® SR 90 mg is a sustained-release tablet that contains Diltiazem Hydrochloride, a calcium channel blocker. It is used to manage conditions such as high blood pressure (hypertension), angina (chest pain), and certain types of irregular heartbeats (arrhythmias). By relaxing blood vessels and reducing the heart's workload, Dilzem® helps improve blood circulation and manage cardiovascular conditions.