Tolerance to the stimulant effects of morphine and pentazocine on avoidance responding in the rat.
D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects*; D001522:Behavior, Animal / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004361:Drug Tolerance; D007279:Injections, Subcutaneous; D008297:Male; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D010423:Pentazocine / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D013268:Stimulation, Chemical; D013997:Time Factors
D009020:Morphine; D010423:Pentazocine