Phencyclidine (1-(1-phenylcyclohexyl)piperidine, PCP) self-administration has been demonstrated in rhesus monkeys, baboons, dogs and rats. Generally, an orderly inverted U-shaped dose-response curve for rates of self-injection has been observed. Total drug intake appears to increase slightly with increases in unit dose; however, this increase is much less than might be expected with other CNS depressants such as barbiturates or morphine. Additionally, several arylcyclohexylamine analogues of PCP and some members of the benzomorphan and dioxolane classes referred to collectively as "phencyclinoids" are self-administered by primates and dogs. New data are presented in this review profiling the self-administration of some of these drugs in rats, as well as a characterization of the self-administration of higher unit doses of PCP than previously reported. Also, preliminary results of the assessment of the reinforcing efficacy of some PCP analogues measured by the progressive ratio procedure are presented. © 1987.
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