title: Analysis and differentiation of mechanism of tolerance to methadone in methadone-fed rats.
mesh_terms: D000698:Analgesia; D000818:Animals; D004361:Drug Tolerance; D008297:Male; D008691:Methadone / Q000378:metabolism / Q000494:pharmacology*; D009020:Morphine / Q000494:pharmacology; D010634:Phenobarbital / Q000494:pharmacology; D051381:Rats; D014018:Tissue Distribution
chemical_list: D009020:Morphine; D008691:Methadone; D010634:Phenobarbital