The effects of morphine-nalorphine mixtures on psychomotor performance.
D006801:Humans; D007858:Learning; D009020:Morphine / Q000494:pharmacology*; D009269:Nalorphine / Q000494:pharmacology*; D011597:Psychomotor Performance
D009020:Morphine; D009269:Nalorphine
LEARNING; MORPHINE/effects; NALORPHINE/effects