RT Journal Article SR Electronic T1 THE MECHANISM OF THE HYPOTENSIVE ACTION OF NARCOTINE HYDROCHLORIDE JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 287 OP 295 VO 123 IS 4 A1 Lawrence C. Weaver A1 William M. Alexander A1 Benedict E. Abreu A1 Alice B. Richards A1 W. Ralph Jones A1 Robert W. Begley YR 1958 UL http://jpet.aspetjournals.org/content/123/4/287.abstract AB Narcotine hydrochloride produces systemic vasodepression which is incompletely blocked by diphenhydramine but is unaffected by atropinization, mid-cervical vagotomy and/or carotid sinus and body denervation. It also increases coronary blood flow and femoral blood flow. Coronary blood flow is increased without significant effects on the other cardiovascular variables. Bronchoconstriction is produced in the dog. Tachyphylaxis develops to the vascular and bronchial effects of this compound. In addition, cross-tachyphylaxis develops between marcotine and 48/80. It is concluded that tue mechanism for these changes is due to histamine liberation.