RT Journal Article SR Electronic T1 NIAARA; A DIGITALIS-LIKE COLOMBIAN ARROW POISON JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 223 OP 229 VO 93 IS 2 A1 K. Mezey A1 C. Uribe-Piedrahita A1 J. Pataki A1 J. Huertas-Lozano YR 1948 UL http://jpet.aspetjournals.org/content/93/2/223.abstract AB 1. Niaara, an arrow poison from Colombia, S. A. is the latex of the tree Ogcodeia ternstroemiiflora Midbr. 2. An amorphous principle ("niaarin") having chemical and pharmacological properties characteristic of the cardiac glycosides has been isolated from the latex of this tree. Neither the crude nor pure materials have any curariform activity. 3. The intravenous LD50 in cats is 0.21 mgm./kgm. It is poorly absorbed from the gastro-intestinal tract. 4. Seven cases of congestive heart failure in man were successfully treated with niaarin.