RT Journal Article SR Electronic T1 THE ACUTE JOINT TOXICITY OF ATABRINE, QUININE, HYDROXYETHYLAPOCUPREINE, PAMAQUINE AND PENTAQUINE JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 133 OP 139 VO 91 IS 2 A1 GRAHAM CHEN A1 E. M. K. GEILING YR 1947 UL http://jpet.aspetjournals.org/content/91/2/133.abstract AB The acute lethal toxicities of atabrine and quinine, quinine and hydroxyethylapocupreine, atabrine and pamaquine, quinine and pamaquine, quinine and pentaquine, were investigated by intraperitoneal injection in mice. It was found that the combinations of these antimalarials are different in their joint toxicity: (1) Atabrine and quinine, quinine and hydroxyethylapocupreine, act independently and similarly (2) Atabrine in sublethal doses and pamaquine act independently but diversely. (3) Quinine and pamaquine, quinine and pentaquine are synergistic in their joint action.