Cited by 73Cannabis and Cannabinoid ResearchSubstance Abuse Treatment and OutcomesSmoking Behavior and Cessation

Naltrexone Maintenance Decreases Cannabis Self-Administration and Subjective Effects in Daily Cannabis Smokers.

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Haney, Margaret, Ramesh, Divya, Glass, Andrew, Pavlicova, Martina, Bedi, Gillinder, Cooper, Ziva D·2015·Neuropsychopharmacology

Abstract

Given that cannabis use is increasing in the United States, pharmacological treatment options to treat cannabis use disorder are needed. Opioid antagonists modulate cannabinoid effects and may offer a potential approach to reducing cannabis use. In this double-blind, placebo-controlled human laboratory study, we assessed the effects of naltrexone maintenance on the reinforcing, subjective, psychomotor, and cardiovascular effects of active and inactive cannabis. Nontreatment-seeking, daily cannabis smokers were randomized to receive naltrexone (50 mg: n=18 M and 5 F) or placebo (0 mg; n=26 M and 2 F) capsules for 16 days. Before, during, and after medication maintenance, participants completed 10 laboratory sessions over 4-6 weeks, assessing cannabis' behavioral and cardiovascular effects. Medication compliance was verified by observed capsule administration, plasma naltrexone, and urinary riboflavin. Relative to placebo, maintenance on naltrexone significantly reduced both active cannabis self-administration and its positive subjective effects ('good effect'). Participants in the placebo group had 7.6 times (95% CI: 1.1-51.8) the odds of self-administering active cannabis compared with the naltrexone group. This attenuation of reinforcing and positive subjective effects also influenced cannabis use in the natural ecology. Naltrexone had intrinsic effects: decreasing ratings of friendliness, food intake, and systolic blood pressure, and increasing spontaneous reports of stomach upset and headache, yet dropout rates were comparable between groups. In summary, we show for the first time that maintenance on naltrexone decreased cannabis self-administration and ratings of 'good effect' in nontreatment-seeking daily cannabis smokers. Clinical studies in patients motivated to reduce their cannabis use are warranted to evaluate naltrexone's efficacy as a treatment for cannabis use disorder.

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  • Acute administration of naltrexone potentiated the positive subjective effects of cannabis, but repeated administration decreased such effects.

    “It has been reported that the acute administration of naltrexone potentiated the positive subjective effects of cannabis but that repeated administration decreased such effects 74, 75.”

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Authors
Haney, M., Ramesh, D., Glass, A., Pavlicova, M., Bedi, G., & Cooper, Z. D.
Affiliations
  • Columbia University Irving Medical Center (US)
  • Virginia Commonwealth University (US)
Corresponding author
Haney, Margaret
Venue
Neuropsychopharmacology
Published
2015-04-16
Volume
40
Issue
11
Pages
2489-2498
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W1988829530
Cited by
73
References
55
Citations by year
2026: 7 · 2025: 7 · 2024: 5 · 2023: 4 · 2022: 5 · 2021: 5 · 2020: 4 · 2019: 4 · 2018: 14 · 2017: 9 · 2016: 7 · 2015: 1 · 2014: 1
FWCI
7.46
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Drug Abuse (DA-09236, R01DA019239, DA 19239, K23DA034877, P50DA009236)
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
Keywords
naltrexone, cannabis use disorder, opioid antagonists, reinforcement effect, cardiovascular effects, psychomotor effects, treatment seeking
MeSH terms
Adult, Affect, Blood Pressure, Cannabis, Double-Blind Method, Eating, Female, Humans, Male, Marijuana Smoking, Middle Aged, Naltrexone, Narcotic Antagonists, Patient Compliance, Random Allocation, Riboflavin, Self Administration, Young Adult

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