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1. Angiotensin I, II and hog renin, infused into the lateral cerebral ventricles (I.C.V.) of water replete cats, each induced water drinking behaviour. 2. Intravenous infusion of high doses of angiotensin I or II also elicited a drinking response. The dipsogenic effect of I.V. renin was not marked. 3. Drinking in response to I.C.V. angiotensin II was abolished after autonomic ganglion blockade with I.V. hexamethonium or pempidine and was significantly reduced after I.V. atropine methonitrate. 4. The dipsogenic response to I.C.V. angiotensin II was unaffected by either peripheral adrenergic neurone blockade with I.V. bethanidine, alpha-adrenoceptor blockade with phentolamine or beta-adrenoceptor blockade with sotalol. 5. Atropine, atropine methonitrate, hexamethonium and pempidine given I.C.V did not inhibit the diposgenic response to I.C.V. angiotensin II. 6. Bethanidine I.C.V. produced a dose related reduction in the dipsogenic response to I.C.V. angiotensin II. 7. The alpha-adrenoceptor blocking agents tolazoline and phenoxybenzamine given I.C.V did not affect angiotensin induced drinking but the response was regularly inhibited by phentolamine I.C.V. 8. The beta-adrenoceptor blocking agents propranolol and practolol given I.C.V. each inhibited angiotensin induced drinking. The L-isomer of propranolol was a more effective blocker than the D-isomer. 9. Isoprenaline given I.C.V induced drinking in ten of sixteen cats. Subcutaneous administration of isoprenaline also elicited drinking but the onset of the response was delayed and the amount consumed slightly less than after I.C.V infusion.

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				J. T. FITZSIMONS Angiotensin, Thirst, and Sodium Appetite Physiol Rev, July 1, 1998; 78(3): 583 - 686. [Abstract] [Full Text] [PDF]