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Wednesday, April 25, 2007

Combined Exposure to Nicotine and Ethanol in Adolescent Mice Differentially Affects Anxiety Levels during Exposure, Short-Term, and Long-Term Withdrawal
Neuropsychopharmacology advance online publication 25 April 2007

Smoking and consumption of alcoholic beverages are frequently associated during adolescence. This association could be explained by the cumulative behavioral effects of nicotine and ethanol, particularly those related to anxiety levels.

However, despite epidemiological findings, there have been few animal studies of the basic neurobiology of the combined exposure in the adolescent brain.

In spite of the fact that generalizations based on the results from a single strain of mice are prone to shortcomings, our results suggest that the deficient response to the anxiolytic effects of ethanol in adolescents co-exposed to nicotine may drive higher ethanol consumption.

Additionally, increased anxiety during long-term smoking and drinking withdrawal may facilitate relapse to drug use.