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Review
. 2017;4(1):25-34.
doi: 10.1007/s40429-017-0129-z. Epub 2017 Feb 18.

Psychopharmacology of Tobacco and Alcohol Comorbidity: a Review of Current Evidence

Sally Adams  1   2
Affiliations
Review

Psychopharmacology of Tobacco and Alcohol Comorbidity: a Review of Current Evidence

Sally Adams. Curr Addict Rep. 2017.

Abstract

Purpose of the review: Comorbidity of alcohol and tobacco use is highly prevalent and may exacerbate the health effects of either substance alone. However, the mechanisms underlying this comorbidity are not well understood. This review will examine the evidence for shared neurobiological mechanisms of alcohol and nicotine comorbidity and experimental studies of the behavioural consequences of these interactions.

Recent findings: Studies examining the shared neurobiology of alcohol and nicotine have identified two main mechanisms of comorbidity: (1) cross-reinforcement via the mesolimbic dopamine pathway and (2) cross-tolerance via shared genetic and nAChR interaction. Animal and human psychopharmacological studies demonstrate support for these two mechanisms of comorbidity.

Summary: Human behavioural studies indicate that (1) alcohol and tobacco potentiate each other's rewarding effects and (2) nicotine reduces the sedative and intoxication effects of alcohol. Together, these findings provide a strong evidence base to support the role of the cross-reinforcement and cross-tolerance as mechanisms underlying the comorbidity of alcohol and tobacco use. Methodological concerns in the literature and recommendations for future studies are discussed alongside implications for treatment of comorbid alcohol and tobacco use.

Keywords: Alcohol; Comorbidity; Cross-reinforcement; Cross-tolerance; Nicotine; Psychopharmacology.

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Conflict of interest statement

Conflict of Interest

Dr. Sally Adams declares that she has no conflicts of interest.

Human and Animal Rights and Informed Consent

This article does not contain any studies with human or animal subjects performed by any of the authors.

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