RT Journal Article SR Electronic T1 A STUDY OF COMPARATIVE ANTIHISTAMINIC ACTIVITY OF SIX COMPOUNDS JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 224 OP 232 VO 90 IS 3 A1 CHARLES A. WINTER YR 1947 UL http://jpet.aspetjournals.org/content/90/3/224.abstract AB Six drugs have been tested in guinea pigs for antihistaminic potency against intravenous histamine, histamine aerosol, and on intestinal strips against histamine in vitro. The six compounds, in descending order of potency, are as follows: Neoantergan, Pyribenzamine, 3015 R.P., 3277 R.P., Benadryl, and Hetramine. Although three of the compounds had a lower acute toxicity than Neoantergan, the toxic/effective dose ratio was highest for that compound. Side reactions were least noticeable after Neoantergan, and most violent after 3277 R.P. Delayed deaths were observed after single injections of 3277 R.P. and Benadryl. 1947 by The American Society for Pharmacology and Experimental Therapeutics