Lack of tolerance to the disinhibiting effects of alcohol in heavy drinkers

Melissa A. Miller, Lon R. Hays, Mark T. Fillmore

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Rationale: Alcohol tolerance is observed as a diminished response to a given dose as a function of repeated administrations of the drug. Research has consistently shown that heavier drinkers display reduced reactions to alcohol (i.e., tolerance) compared with lighter drinkers. However, the majority of this work has focused primarily on measures of motor performance, whereas the development of tolerance to alcohol's impairing effects on cognitive processes, such as inhibitory mechanisms of behavioral control, remains relatively unexplored. Objective: The purpose of the present study was to examine the relationship between drinking habits and the degree to which alcohol affects drinkers' inhibitory control and motor coordination. Methods: Fifty-two non-dependent drinkers reported their recent drinking patterns. Their inhibitory control and motor coordination were measured in response to placebo and 0.65 g/kg alcohol. Results: Alcohol significantly impaired inhibitory control and motor coordination compared with placebo. Moreover, greater quantity and frequency of recent consumption predicted less alcohol impairment of motor coordination. However, there was no relationship between recent drinking habits and the degree of impairment of inhibitory control. Conclusions: These findings suggest that tolerance to the disinhibiting effects of alcohol might not readily develop as a result of recent, heavy drinking.

Original languageEnglish
Pages (from-to)511-518
Number of pages8
JournalPsychopharmacology
Volume224
Issue number4
DOIs
StatePublished - Dec 2012

Bibliographical note

Funding Information:
This research was supported by National Institute on Alcohol Abuse and Alcoholism Grants R01 AA018274 and R01 AA012895, and by National Institute on Drug Abuse Grants P50 DA005312 and T32 DA07304. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute on Alcohol Abuse and Alcoholism, National Institute on Drug Abuse, or the National Institutes of Health.

Keywords

  • Alcohol
  • Inhibitory control
  • Motor coordination
  • Tolerance

ASJC Scopus subject areas

  • Pharmacology

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