Metoprolol v. clonidine in the prophylactic treatment of migraine.

In a double-blind, cross-over trial, the migraine prophylactic effect of the beta 1-adrenoceptor antagonist metoprolol was compared with that of clonidine. The dosage of metoprolol was 50 mg b.i.d. and of clonidine 50 micrograms b.i.d. Thirty-one patients were included; twenty-three completed the entire study. Six patients withdrew during clonidine treatment, one during metoprolol treatment and one during the wash-out period (placebo). Metoprolol had a significantly better migraine prophylactic effect than clonidine regarding such parameters as the attack frequency, the number of migraine days and the sum of intensity score. Compared to baseline (placebo), metoprolol decreased these parameters, while clonidine did not. Metoprolol, but not clonidine, also reduced the acute consumption of analgesics. No differences were found as regards side effects.