Generic name: Verapamil
Calan is a medicine for supraventricular tachycardia (SVT), the heart rhythm disturbance. It also treats heart rate rhythm disorders, including atrial flutter and atrial fibrillation. It may also be used by your physician to treat certain other conditions.
It refers to calcium channel blockers. It slows the heart rate, the heart electrical conduction, or makes the heart rhythm normal.