The effects of morphine and nalorphine on the small intestine of normal and morphine-tolerant rat and guinea-pig.
D000818:Animals; D006168:Guinea Pigs; D007421:Intestine, Small; D009020:Morphine; D009269:Nalorphine / Q000494:pharmacology*; D051381:Rats
D009020:Morphine; D009269:Nalorphine
NALORPHINE/pharmacology