The interaction of morphine and nalorphine on respiration.
D000704:Analysis of Variance; D002986:Clinical Trials as Topic; D004336:Drug Antagonism; D006801:Humans; D008297:Male; D009020:Morphine / Q000008:administration & dosage / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D009269:Nalorphine / Q000008:administration & dosage / Q000494:pharmacology*; D011336:Probability; D012119:Respiration / Q000187:drug effects*; D013223:Statistics as Topic; D013268:Stimulation, Chemical
D009020:Morphine; D009269:Nalorphine