Cephalalgia : an international journal of headache
-
Randomized Controlled Trial
Carbachol induces headache, but not migraine-like attacks, in patients with migraine without aura.
Carbachol induces headache in healthy subjects, but the migraine eliciting effect of carbachol has not previously been studied. We hypothesized that the cholinomimetic agonist carbachol would induce headache and migraine-like attacks in migraineurs. Carbachol (3 µg/kg) or placebo was randomly infused into 18 patients with migraine without aura in a double-blind crossover study. ⋯ There was no difference in incidence of migraine-like attacks after carbachol (n = 8) compared with placebo (n = 6) (P = 0.687). Carbachol caused a decrease in V(MCA) (P = 0.044), but no change in STA (P = 0.089) compared with placebo. The study demonstrated that carbachol provocation is not a good model for experimental migraine.