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Br J Clin Pharmacol. 1983 Sep;16(3):305-11.

The effect of a 5-HT antagonist, ketanserin, on blood pressure, the renin-angiotensin system and sympathoadrenal function in normal man.

Abstract

The role of endogenous 5-hydroxytryptamine (5-HT) in the control of blood pressure, the renin-angiotensin system and sympatho-adrenal function was investigated in normal man. Ketanserin (a specific 5-HT2 antagonist) administered intravenously caused a small decrease in blood pressure in salt-depleted recumbent subjects. A more marked postural fall in pressure occurred in both sodium-depleted and repleted normal subjects. Plasma active renin concentration and angiotensin II increased after administration of ketanserin, but plasma aldosterone, cortisol and noradrenaline were unchanged. 5-HT may be important in the control of blood pressure in man and specific 5-HT2 receptor antagonists could be a useful new class of antihypertensive agents.

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