Adenosine vs. calcium channel blockers for supraventricular tachycardia.

Adenosine and verapamil (Calan, Isoptin SR) are equally effective for treating acute supra-ventricular tachycardia in adults. Patients treated with adenosine have a higher rate of minor, transient adverse effects than patients treated with verapamil; however, rare but serious adverse effects may be more common with verapamil, especially in children. Although both agents are appropriate options, adenosine is generally the preferred initial agent.