Dotarizine is a drug used in the treatment of migraine which acts as a calcium channel blocker and also as an antagonist at the 5HT2A receptor and to a lesser extent at the 5HT1A and 5HT2C receptors. The anti-migraine action is thought to be due to its action as a vasodilator but it also has some anxiolytic effects and blocks amnesia produced by electroconvulsive shock in animals.
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