Inhibitory effect of 8-azuguanine on the development of tolerance in the analgesic action of morphine.
D000818:Animals; D001375:Azaguanine / Q000494:pharmacology*; D004361:Drug Tolerance; D007274:Injections, Intraperitoneal; D008297:Male; D051379:Mice; D009020:Morphine / Q000037:antagonists & inhibitors*
D009020:Morphine; D001375:Azaguanine