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  • Title: The development of cross tolerance between ethanol and morphine.
    Author: Fidecka S, Tamborska E, Malec D, Langwiński R.
    Journal: Pol J Pharmacol Pharm; 1986; 38(3):277-84. PubMed ID: 3774626.
    Abstract:
    The development of tolerance to ethanol-induced analgesia and cross tolerance between ethanol and morphine was studied in mice and rats. Chronic administration of ethanol resulted in the tolerance to its analgesic effects in rats (2.8 and 3.0 g/kg) as well as in mice (2.8 and 4.0 g/kg). Implantation of morphine pellets caused the development of cross tolerance to analgesic effect of 3.0 g/kg of ethanol in rats and 2.8 g/kg of ethanol in mice. The tolerance developed to antinociceptive effects of morphine (10 mg/kg) in chronic alcoholized mice but not in chronic alcoholized rats. These results seem to support the hypothesis on the opiate-like mechanism of ethanol action.
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