Studies on the regulation of sensitivity to the narcotic cue.
D000700:Analgesics; D000818:Animals; D003463:Cues; D004193:Discrimination Learning / Q000187:drug effects; D004361:Drug Tolerance; D005283:Fentanyl / Q000494:pharmacology; D005795:Generalization, Stimulus / Q000187:drug effects; D008297:Male; D009294:Narcotics / Q000494:pharmacology*; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D013997:Time Factors
D000700:Analgesics; D009294:Narcotics; D005283:Fentanyl