Rachel L. Tomko, PhD Research Assistant Professor Department of Psychiatry and Behavioral Sciences
Jennifer L. Jones, MD Resident Physician Departments of Psychiatry and Behavioral Sciences and Internal Medicine
Amanda K. Gilmore, PhD Research Assistant Professor College of Nursing and Department of Psychiatry and Behavioral Sciences
Kathleen T. Brady, MD, PhD Distinguished University Professor Department of Psychiatry and Behavioral Sciences
Sudie E. Back, PhD Professor Department of Psychiatry and Behavioral Sciences
Kevin M. Gray, MD Professor Department of Psychiatry and Behavioral Sciences
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Medical University of South Carolina Charleston, South Carolina
Disclosures The authors report no financial relationships with any company whose products are mentioned in this article or with manufacturers of competing products. This article was supported by National Institutes of Health grants from the National Institute of Drug Abuse (R25 DA020537, R01 DA042114, R01 DA038700, R01 DA026777, K23 DA042935, K02 DA039229, UG1 DA013727) and the National Institute on Alcohol Abuse and Alcoholism (T32 AA007474, R01 AA025086) and the Department of Defense (W81XWH-13-2-0075 9261sc).
Clinical implications.Data on NAC’s efficacy for tobacco use disorder come from small, pilot trials. Although initial evidence is promising, it is premature to suggest NAC for smoking cessation until a fully powered, randomized clinical trial provides evidence of efficacy.
Alcohol use disorder
Alcohol use disorders are widely prevalent; 13.9% of U.S. adults met criteria in the past year, and 29.1% of U.S. adults meet criteria in their lifetime.38 Alcohol use disorders can result in significant negative consequences, including relationship problems, violent behavior, medical problems, and death. Existing FDA-approved medications for alcohol use disorder include naltrexone, acamprosate, and disulfiram.
Due to the severe potential health consequences of alcohol, NAC has been examined as a possible aid in preventing relapse. However, most studies have been conducted using animals. Three studies have examined alcohol use in humans (Table 536,39,40). One was a pilot study,39 and the other 2 were secondary data analyses.36,40 None of them specifically focused on alcohol use disorders. A pilot study of 35 veterans with co-occurring posttraumautic stress disorder (PTSD) and SUDs (82% of whom had an alcohol use disorder) found that compared with placebo, NAC significantly decreased PTSD symptoms, craving, and depression.39 In a study of 75 adults with bipolar disorder, secondary alcohol use was not significantly reduced.36 However, one study suggested that NAC may decrease adolescent alcohol and marijuana co-use.40 Future work is needed to examine the potential clinical utility of NAC in individuals with alcohol use disorders.
Findings from animal studies indicate that NAC may:
reduce alcohol-seeking41
reduce withdrawal symptoms42
reduce the teratogenic effects of alcohol43
prevent alcohol toxicity44
reduce health-related consequences of alcohol (eg, myocardial oxidative stress45 and alcohol-related steatohepatitis46).