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Carbachol induces headache, but not migraine-like attacks, in patients with migraine without aura

HW Schytz

HW Schytz

Danish Headache Center and Department of Neurology, Glostrup Hospital, Faculty of Health Sciences, University of Copenhagen, Glostrup, Denmark

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T Wienecke

T Wienecke

Danish Headache Center and Department of Neurology, Glostrup Hospital, Faculty of Health Sciences, University of Copenhagen, Glostrup, Denmark

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J Olesen

J Olesen

Danish Headache Center and Department of Neurology, Glostrup Hospital, Faculty of Health Sciences, University of Copenhagen, Glostrup, Denmark

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M Ashina

M Ashina

Danish Headache Center and Department of Neurology, Glostrup Hospital, Faculty of Health Sciences, University of Copenhagen, Glostrup, Denmark

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First published: 09 July 2009
Citations: 1
Henrik Winther Schytz, Danish Headache Center and Department of Neurology, Glostrup Hospital, Faculty of Health Sciences, University of Copenhagen, 2600 Glostrup, Denmark. Tel. + 45 4323 3066, fax + 45 4323 3970, e-mail [email protected]

Abstract

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. Headache was scored on a verbal rating scale from 0 to 10. Velocity in the middle cerebral artery (VMCA) and diameter of the superficial temporal artery (STA) were recorded. Fifteen patients experienced headache after carbachol compared with eight after placebo (P = 0.039). 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 VMCA (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.

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