Verapamil [ver ap' a mil]
(Class IV, Calcium Channel Blocker)

  • Blocks cardiac calcium channels in slow response tissues, such as the sinus and AV nodes.

  • Useful in treating AV reentrant tachyarrhythmias and in management of high ventricular rates secondary to atrial flutter or fibrillation.

  • Major adverse effect (i.v. administration) is hypotension. Heart block or sinus bradycardia can also occur.


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