title: Tolerance in adult male rats after early morphine pellet implantation.
mesh_terms: D000367:Age Factors; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D001835:Body Weight / Q000187:drug effects; D003345:Corticosterone / Q000097:blood; D004343:Drug Implants; D004361:Drug Tolerance; D008297:Male; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats
chemical_list: D004343:Drug Implants; D009020:Morphine; D003345:Corticosterone