Increased phencyclidine self-administration due to food deprivation: interaction with concentration and training conditions.
Psychopharmacology 1984 M E Carroll, D C Stotz
Six monkeys were trained to self-administer orally delivered phencyclidine (0.25 mg/ml) under a fixed-ratio 16 (FR-16) schedule. Water was concurrently available under an FF-16 schedule. During initial phencyclidine training, three monkeys were allowed free access to food (food satiation) and three were maintained at 85% of their free-feeding body weights (food deprivation). At the end of the...