Tolerance to morphine in the white mice.
D000700:Analgesics / Q000037:antagonists & inhibitors; D000818:Animals; D004361:Drug Tolerance; D051379:Mice; D009020:Morphine / Q000494:pharmacology*; D010634:Phenobarbital / Q000494:pharmacology
D000700:Analgesics; D009020:Morphine; D010634:Phenobarbital