Biological and Pharmaceutical Bulletin 1997-Jul
Antiemetic effects of morphine on motion- and drug-induced emesis in Suncus murinus.
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概要
Emetic and antiemetic effects of morphine were investigated in Suncus murinus. Subcutaneous (up to 30 mg/kg) or intracerebroventricular administration (50 micrograms) of morphine failed to cause emesis. However, pretreatment with morphine (s.c.) prevented the emesis induced by nicotine (10 mg/kg, i.p.), copper sulfate (40 mg/kg, p.o.), cisplatin (20 mg/kg, i.p.) and motion stimulus. These results suggest that morphine has only antiemetic potency and may block a common mechanism for the emetic reflex of suncus, because the antiemetic effects of the drug were exerted irrespective of the stimulus.