Abstract

The antinociceptive effect of Crotalus durissus terrificus snake venom, previously demonstrated in the hot-plate test, was investigated in mice using the tail-flick model. The venom, administered by the intraperitoneal, subcutaneous or oral route, did not modify the basal latency time to the noxious stimulus and the association of the venom with morphine did not alter the opioid analgesic effect of this drug. These data indicate that the antinociceptive effect of the venom is mainly due to a supraspinally integrated response.

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