Natural Health Research

Naturopathic Medicine
Health Quizzes
Verapamil, Calan, Covera, Isoptin, Tarka, Verelan


Verapamil is an L-type calcium-channel blocker used in the treatment of hypertension, angina pectoris, and some types of arrhythmia.


calcium-channel blocker


angina, atrial fibrillation, atrial flutter, hypertension, mania, migraine prophylaxis, paroxysmal supraventricular tachycardia, Prinzmetal's angina, unstable angina,

Side Effects

AV block, constipation, dizziness, elevated hepatic enzymes, fatigue, headache, heart failure, hypotension, nausea/vomiting, peripheral edema, pulmonary edema, sinus bradycardia, sinus tachycardia, ventricular fibrillation,

Drug-Vitamin-Herb Interactions

Negative interactions:

Calcium and Vitamin D
Calcium and Vitamin D may counteract the action of calcium-channel blockers.

Grapefruit juice
Grapefruit juice inhibits the breakdown of several drugs, including calcium channel blockers.




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