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    The role of vasopressin on the effect of U-50,488 to block the development of morphine tolerance and physical dependence

    U-50,488, a selective κ-opioid receptor agonist, has been reported to inhibit the development of antinociceptive tolerance to morphine in mice, rats and guinea pigs, but the mechanism involved in this action ...

    P.-L. Tao, Wan-Cherng Liu, Yuan-Sheng Tsuei in Naunyn-Schmiedeberg's Archives of Pharmaco… (1997)