title: Tolerance to morphine in the rat: its prevention by naloxone.
mesh_terms: D000818:Animals; D004361:Drug Tolerance; D008297:Male; D009020:Morphine / Q000037:antagonists & inhibitors*; D009270:Naloxone / Q000494:pharmacology*; D051381:Rats; D011955:Receptors, Drug; D013997:Time Factors
chemical_list: D011955:Receptors, Drug; D009270:Naloxone; D009020:Morphine