RT Journal Article SR Electronic T1 AN INVESTIGATION OF THE ACUTE TOXICITY OF THE OPTICAL ISOMERS OF ARTERENOL AND EPINEPHRINE JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 502 OP 505 VO 95 IS 4 A1 HOPPE, JAMES O. A1 SEPPELIN, D. K. A1 LANDS, A. M. YR 1949 UL http://jpet.aspetjournals.org/content/95/4/502.abstract AB 1. Toxicity ratios for the levo, dextro and racemic forms of arterenol were found to be 1:14:1.3 in rats and 1:12:1.5 in mice by intravenous injection. 2. Toxicity ratios for the levo, dextro and racemic forms of epinephrine were found to be 1:20:1.8 in rats and 1:18.5:1.5 in mice by intravenous injection. 3. Rats were 50 times as sensitive to arterenol and 60 times as sensitive to epinephrine as mice when judged by the acute lethal doses. 4. The three optical forms of epinephrine were approximately twice as toxic as the corresponding forms of arterenol. 5. l-Epinephrine was significantly more toxic than the racemic mixture whereas no significant difference was found between l-and dl-arterenol in either rats or mice. 6. The dose-mortality curves were very steep in rats for arterenol and epinephrine and in mice for l, and d, l-epinephrine. However, they were flat in mice for d-epinephrine and arterenol. 1949 by The American Society for Pharmacology and Experimental Therapeutics