RT Journal Article SR Electronic T1 Verapamil in prophylactic therapy of migraine JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 973 OP 973 DO 10.1212/WNL.34.7.973 VO 34 IS 7 A1 Markley, Herbert G. A1 Cheronis, John C.D. A1 Piepho, Robert W. YR 1984 UL http://n.neurology.org/content/34/7/973.abstract AB We conducted a double-blind, placebo-controlled crossover study of verapamil HCI in the prophylaxis of chronic migraine headaches. Verapamil significantly reduced both headache frequency and duration with few side effects. The drug may be useful for a segment of the migraine population refractory to other prophylactic agents or for those who cannot tolerate the side effects of other drugs.