verapamil /verap″əmil/ , a calcium channel blocker. ▪ INDICATIONS: It is prescribed for the treatment of vasospastic and exertional angina, supraventricular tachycardia, atrial fibrillation, and atrial flutter. ▪ CONTRAINDICATIONS: Severe left ventricular dysfunction, hypotension, cardiogenic shock, sick sinus syndrome, or second- or third-degree atrioventricular (AV) block prohibits its use. ▪ ADVERSE EFFECTS: Among the more serious adverse effects are hypotension, peripheral edema, AV block, bradycardia, congestive heart failure, pulmonary edema, constipation, and dizziness.
