title: Proceedings: A simple model for the assessment of analgetic tolerance in the rat.
mesh_terms: D000700:Analgesics / Q000494:pharmacology*; D000818:Animals; D004361:Drug Tolerance; D008691:Methadone / Q000494:pharmacology; D008954:Models, Biological; D009020:Morphine / Q000494:pharmacology; D011312:Pressure; D051381:Rats; D013997:Time Factors
chemical_list: D000700:Analgesics; D009020:Morphine; D008691:Methadone