Abstract
Selective antagonism by naltrindole of the antinociceptive effects of the delta opioid agonist cyclic[D-penicillamine2-D-penicillamine5]enkephalin in the rat.
E J Drower, A Stapelfeld, M F Rafferty, B R de Costa, K C Rice and D L Hammond
Journal of Pharmacology and Experimental Therapeutics November 1991, 259 (2) 725-731;