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Blood pressure effects of hydrochlorothiazide, applied to the rat hypothalamus
1Department of Pharmacology, Hebrew University-Hadassah Medical School, Jerusalem, Israel.
Journal of Basic and Clinical Physiology and Pharmacology
|January 1, 1996
Abstract:
In the search for central actions of hydrochlorothiazide (HCTZ), the drug was injected directly into the hypothalamus (HTH) of hypertensive rats. This caused regular fall of blood pressure (BP) and development of a flat dose-response curve-both events resembling corresponding phenomena in systemic injections. In a small number of experiments, the drug caused a rise in BP. This result was enhanced when normotensive rats were injected into the HTH. It is concluded that the rat HTH bears two antagonistic receptors for HCTZ.