Find patient medical information for Verapamil (Calan, Verelan, others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Verapamil is an oral medication used to treat high blood pressure. Learn who it’s for, how it works, its side effects, warnings, and more. Verapamil is used alone or together with other medicines to treat heart rhythm problems, severe chest pain (angina), or high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. Verapamil, sold under various trade names, [1] is a calcium channel blocker medication used for the treatment of high blood pressure, angina (chest pain from not enough blood flow to the heart), and supraventricular tachycardia. [9] Verapamil is used to treat angina, arrhythmias, or to lower blood pressure. Verapamil works by changing the passage of calcium ions across cell membranes of smooth muscle cells and heart (myocardial) cells. Verapamil is used to treat hypertension (high blood pressure), angina (chest pain), and certain heart rhythm disorders. The immediate-release tablets are also used alone or with other medications to prevent and treat irregular heartbeats. Learn how verapamil works, including what it’s used for and the possible side effects you may experience. Verapamil is a calcium channel blocker that widens your blood vessels and relaxes your heart muscle. This improves blood flow to your heart and helps it pump more easily. Verapamil is a non-dihydropyridine calcium channel blocker. It's used to treat high blood pressure, arrhythmias, and chest pain (or angina) in adults. Verapamil works by slowing your heart rate and relaxing your blood vessels. This medication is taken by mouth typically about 3 to 4 times per day. Verapamil is indicated to treat hypertension and other conditions related to heart disease. Learn about side effects, drug interactions, dosages, warnings, and more.