RT Journal Article SR Electronic T1 THE ANTI-HISTAMINE ACTIVITY OF DIETHYLAMINOETHYL-DIHYDROANTHRACENE-CARBOXYLATE AND OTHER SUBSTANCE JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 90 OP 95 VO 83 IS 1 A1 GERHARD LEHMANN A1 JAMES W. YOUNG YR 1945 UL http://jpet.aspetjournals.org/content/83/1/90.abstract AB Diethylaminoethyl-dihydroanthracene-carboxylate provides 100 per cent protection to sensitized guinea pigs against one fatal dose of antigen. Diethylaminoethyl-xanthene-carboxylate is 70 per cent effective. Diethylaminoethyl-fluorene-carboxylate, aminophylline and epinephrine protect only 37 per cent of the animals. The dihydroanthracene derivative reduces the volume but not the acid concentration of histamine-induced gastric secretion. The dihydroanthracene derivative intensified the intradermal skin reaction produced by histamine. The increase in the resistance of the pulmonary circulation of the isolated perfused guinea pig's lung caused by epinephrine, histamine or anaphylactic reaction, is reduced by aminophylline and the dihydroanthracene derivative. The latter is more potent in its bronchodilator effect than aminophylline. The possibility that the main mechanism of aminophylline in bronchial asthma is the decrease in the resistance of the pulmonary circulation, is suggested.