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Effects of naloxone and buprenorphine on intravenous acetaldehyde self-injection in rats


, : Effects of naloxone and buprenorphine on intravenous acetaldehyde self-injection in rats. Physiology & Behavior 33(3): 449-455

Rats can be induced to self-inject acetaldehyde under an appropriate operant conditioning schedule. The narcotic antagonist naloxone (30 mg/kg) is shown to produce a decrease in schedule-induced acetaldehyde self-injection, but was without effect on both barpress responding and spontaneous activity in rats tested individually for fine, gross and total activity. On the other hand buprenorphine (0.3 and 3 mg/kg), the mixed agonist-antagonist derived from the opium alkaloid thebaine, also produced a significant decrease in acetaldehyde self-injection. However, a significant effect of buprenorphine on barpressing in otherwise drug naive rats indicated that this finding should not be dissociated from a possible involvement of buprenorphine on motor responding. While the findings are consistent with the hypothesis of opiate involvement in acetaldehyde self-administration, caution must be exercised when drawing conclusions about the participation of endogenous opiates in acetaldehyde-mediated behavior.

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PMID: 6514833


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