Prior hot plate exposure enhances morphine analgesia in tolerant and drug-naive rats.

Abstract

The associative model of morphine tolerance predicts that established tolerance should be attenuated, i.e., extinguished, by placebo injections in the former morphine injection environment. The present study examined the effect of placebo sessions, with and without accompanying nociceptive stimulation, on the extinction of analgesic tolerance. In Experiment… (More)

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