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Acamprosate reduces context-dependent ethanol effects.
Etienne Quertemont1, Christian Brabant, Philippe De Witte
1Biologie de Comportement, Université catholique de Louvain, Louvain-La-Neuve, Belgium. Quertemont@bani.ucl.ac.be
Psychopharmacology
|October 10, 2002
Summary
Acamprosate blocks environment-dependent ethanol tolerance in rats by disrupting conditioned responses to stimuli associated with alcohol. This finding may explain acamprosate's effectiveness in preventing relapse in alcoholics.
Area of Science:
- Neuroscience
- Pharmacology
- Behavioral Science
Background:
- Environmental stimuli associated with ethanol administration can lead to tolerance and contribute to alcohol abuse.
- Acamprosate is a medication that may reduce the impact of these environmental cues.
- Understanding this mechanism could improve treatments for alcoholism.
Purpose of the Study:
- To investigate if acamprosate affects ethanol-conditioned environmental stimuli.
- To determine acamprosate's impact on spontaneous motor activity in a drug-conditioning paradigm.
Main Methods:
- Wistar rats were conditioned to associate an environment with ethanol administration.
- Rats received various ethanol doses to assess motor activity and tolerance.
- The study was repeated with rats chronically treated with acamprosate.
Main Results:
- Rats exposed to ethanol in a specific environment developed environment-dependent tolerance to ethanol's effects.
- Acamprosate completely eliminated this environment-dependent tolerance.
- Acamprosate did not affect conditioned hyperactivity in the testing environment.
Conclusions:
- Acamprosate reduces the conditioned effects of environmental stimuli associated with ethanol.
- This action of acamprosate may be crucial for its anti-relapse effects in treating alcoholism.