Experiments on rats showed that meta-chlorophenylpiperazine, as well as serotonin, decreases cerebral blood flow registered in internal carotid artery of narcotized animals. Therefore, this agonist of postsynaptic 5HT(2B/2C) receptors can be used for directed search of new antimigraine drugs. Tropoxin (10 mg/kg) substantially reduces constrictor reactions of cerebral blood vessels induced by meta-chlorophenylpiperazine. The effect was observed during both prophylaxis and treatment of the model disorder with this drug.
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