Centrally mediated antihypertensive and bradycardic effects of methysergide in spontaneously hypertensive rats.


Methysergide caused dose-dependent reductions in systolic blood pressure and heart rate of unanesthetized SHR, whereas cyproheptadine was ineffective. In pithed SHR pretreated with methysergide or cyproheptadine, pressor responses to 5-HT were abolished. Responses to sympathetic nerve stimulation were unaltered by methysergide, whereas cyproheptadine… (More)


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