Phencyclidine-like discriminative effects of opioids in the rat.
Journal of Pharmacology and Experimental Therapeutics September 1, 1980 S. Holtzman
Possible commonalities in the discriminative stimulus properties of phencyclidine (PCP) and opioids were investigated in rats trained to discriminate between i.p. injections of saline and 2.0 mg/kg of PCP in a two-choice discrete-trial avoidance paradigm. Behavior was considered to be under stimulus control when a rat reliably completed at least 18 trials of a 20-trial session on the...