TY - JOUR T1 - STUDIES ON BEHAVIOR. V. ACTIONS OF <em>l</em>-EPINEPHRINE AND RELATED COMPOUNDS JF - Journal of Pharmacology and Experimental Therapeutics JO - J Pharmacol Exp Ther SP - 281 LP - 287 VL - 127 IS - 4 AU - R. J. Wurtman AU - M. M. Frank AU - W. H. Morse AU - P. B. Dews Y1 - 1959/12/01 UR - http://jpet.aspetjournals.org/content/127/4/281.abstract N2 - The output of behavior of pigeons working on a fixed-interval schedule of positive reinforcement is reduced by intramuscular doses of 30 to 100 µg of l-epinephrine. Larger doses were required to suppress behavior on a small fixedratio schedule. The potency of l-norepinephrine in suppressing behavior was about one-third, and the potencies of d-epinephrine and d-norepinephrine about onetenth, that of l-epinephrine. The suppressing action of l-epinephrine was greatly reduced by phenoxybenzamine. ER -