Morphine tolerance and naloxone receptor binding.
D000818:Animals; D004305:Dose-Response Relationship, Drug; D004361:Drug Tolerance; D008297:Male; D009020:Morphine; D009270:Naloxone / Q000378:metabolism*; D051381:Rats; D011955:Receptors, Drug; D013997:Time Factors
D011955:Receptors, Drug; D009270:Naloxone; D009020:Morphine