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Updated: Jun 24, 2026

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
Published on: July 29, 2014
[Afobazole influence on antinociceptive properties of morphine]
Abstract:
The effects of afobazole (1.0 and 10.0 mg/kg, i.p.) on the antinociceptive properties of morphine (3.0 mg/kg, i.p.) were studied in mice. It is shown that afobazole attenuates the analgesic action of morphine in the "hot plate" and "tail flick" tests. This effect was prevented by sigma 1 receptor antagonist haloperidol (2.0 mg/kg, i.p.). Data obtained suggested that a decrease in the morphine antinociceptive action by afobazole is related to its agonistic interaction with sigma 1 receptors at supraspinal and spinal levels.
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