RT Journal Article SR Electronic T1 PHARMACOLOGICAL AND TOXICOLOGICAL PROPERTIES OF TWO NEW β-ADRENERGIC RECEPTOR ANTAGONISTS JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 161 OP 173 VO 149 IS 2 A1 P. M. Lish A1 J. H. Weikel A1 K. W. Dungan YR 1965 UL http://jpet.aspetjournals.org/content/149/2/161.abstract AB Studies involving the responses of respiratory and uterine smooth muscle and cardiac muscle to isoproterenol have revealed potent and selective β-adrenergic blocking action as a property of two phenethanolamine compounds bearing a methylsulfonamido radical at the para position on the benzene ring. These compounds had no other significant peripheral actions, including no local anesthetic action, and only limited effects on the central nervous system. Acute toxicity studies in mice, rats, dogs, and rabbits, and subacute toxicity studies in rats and dogs, indicated extremely low toxic liability. Neither compound had harmful effects on the fetuses of mice or rabbits dosed during critical days of pregnancy. The Williams & Wilkins Comapny