Verapamil is a calcium channel blocker. It works by relaxing the muscles of your heart and blood vessels. Verapamil is used to treat hypertension (high blood pressure), angina (chest pain), and certain heart rhythm disorders. Verapamil may also be used for purposes not listed in this medication guide.
Calan SR is a calcium channel blocker that works by dilating the human blood vessels to lower blood pressure. The immediate-release form of Calan SR is used in the prevention and treatment of irregular heartbeats and treatment of angina. This medication works by relaxing blood vessels to ensure the heart is not overworked, also increasing blood and oxygen supply to the heart.