Cited by 68Substance Abuse Treatment and OutcomesAlcohol Consumption and Health EffectsNeurotransmitter Receptor Influence on Behavior

Efficacy and tolerability of baclofen in a U.S. community population with alcohol use disorder: A dose-response, randomized, controlled trial

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Garbutt, James C., Kampov-Polevoy, Alexei B., Pedersen, Cort, Stansbury, Melissa, Jordan, Robyn, Willing, Laura, Gallop, Robert J.·2021·Neuropsychopharmacology

Abstract

agonist, has been identified as a potential pharmacotherapy for AUD. In a 16-week double-blind, randomized, placebo-controlled trial, we investigated 30 and 90 mg/day of baclofen compared to placebo and examined effects of dose, sex, and level of pretreatment drinking. One hundred and twenty participants with DSM-IV alcohol dependence (age 46.1 (sd = 10.1) years, 51.7% male) were randomized after exclusion for unstable medical/psychiatric illness and/or dependence on drugs other than nicotine. Seventy-three participants completed the trial. A main effect of baclofen was found [%HDD (F(2,112) = 4.16, p = 0.018, d = 0.51 95%CI (0.06-0.95), 13.6 fewer HDD) and %ABST (F(2,112) = 3.68, p = 0.028, d = 0.49 95%CI (0.04-0.93), 12.9 more abstinent days)] and was driven by the 90 mg/day dose. A sex × dose interaction effect was present for both %HDD (F(2,110) = 5.48, p = 0.005) and %ABST (F(2,110) = 3.19, p = 0.045). Men showed a marginally positive effect for 90 mg/day compared to PBO (%HDD t(110) = 1.88, p = 0.063, d = 0.36 95%CI (-0.09-0.80), 15.8 fewer HDD days; %ABST t(110) = 1.68 (p = 0.096, d = 0.32 95%CI (-0.12-0.76), 15.7 more ABST)) with no effect for 30 mg/day. Women showed a positive effect for 30 mg/day (%HDD, t(110) = 3.19, p = 0.002, d = 0.61 95%CI (0.16-1.05), 26.3 fewer HDD days; %ABST t(110) = 2.73, p = 0.007, d = 0.52 95%CI (0.07-0.96), 25.4 more ABST days) with marginal effects for 90 mg/day on %ABST (p = 0.06) with drop-outs/dose reduction from sedative side-effects of 59% in women at 90 mg/day compared to 5% for men. These findings support the hypothesis that baclofen has efficacy in AUD and suggest that dose and sex be further explored as potential moderators of baclofen response and tolerability.

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  • In a 16-week RCT with 120 participants diagnosed with AUD, baclofen at 90 mg/day led to a reduction in the percentage of heavy drinking days and an increase in abstinent days, and higher doses were less well tolerated in female participants.

    “The key findings indicated a significant impact of baclofen, particularly at the 90 mg/day dose, leading to a reduction in the percentage of heavy drinking days and an increase in abstinent days. Notably, higher doses were less well tolerated in female participants [56].”

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  1. [17]First, MB, Spitzer RL, Gibbon M, Williams JBW. Structured clinical interview for DSM-IV-TR axis I disorders, research version, patient edition. (SCID-I/P) 2002; New York: Biometrics Research, New York State Psychiatric Institute.
  2. [20]Speilberger CD, Gorsuch RL, Lushene RE. The state trait anxiety inventory manual. 1969; Palo Alto: Consulting Psychologists Press.
  3. [32]Leggio L Zywiak WH Edwards SM Tidey JW Swift RM Kenna GA A preliminary double-blind, placebo-controlled randomized study of baclofen effects in alcoholic smokers Psychopharmacology 2015 232 233 43 10.1007/s00213-014-3652-9 24973894 PMC4278944 · DOI

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Authors
Garbutt, J. C., Kampov-Polevoy, A. B., Pedersen, C., Stansbury, M., Jordan, R., Willing, L., & Gallop, R. J.
Affiliations
  • University of North Carolina at Chapel Hill (US)
  • West Chester University (US)
Corresponding author
Garbutt, James C.
Venue
Neuropsychopharmacology
Published
2021-06-21
Volume
46
Issue
13
Pages
2250-2256
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W3176085562
Cited by
68
References
38
Citations by year
2026: 6 · 2025: 11 · 2024: 17 · 2023: 12 · 2022: 21 · 2021: 1
FWCI
9.18
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • University of South Carolina
  • National Institute on Alcohol Abuse and Alcoholism (R01AA020824)
Topics
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
baclofen, alcoholism, dose-response relationship, sex differences, alcohol abstinence, heavy drinking days, alcohol withdrawal symptoms, tolerability, community-dwelling adults, alcohol dependence severity, relapse prevention
MeSH terms
Alcoholism, Baclofen, Double-Blind Method, Female, Humans, Male, Middle Aged, Treatment Outcome

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