CBD Alone Does Not Effectively Treat Substance Use Disorders, But CBD-THC Combination Helps Cannabis Withdrawal
An umbrella review of 22 systematic reviews found CBD monotherapy is not effective for substance use disorders, but nabiximols (CBD+THC) shows positive effects on cannabis withdrawal and craving.
Quick Facts
What This Study Found
From 22 systematic reviews (5 with meta-analysis), CBD monotherapy does not appear efficacious for treating substance use disorders including cannabis, tobacco, alcohol, and opioid use. However, nabiximols (CBD+THC combination) demonstrated positive effects on cannabis withdrawal and craving symptoms. Evidence for CBD alone is limited and inconclusive for all addiction-related outcomes.
Key Numbers
22 systematic reviews included. 5 included meta-analyses. CBD alone: not efficacious for any SUD. Nabiximols (CBD+THC): positive for cannabis withdrawal and craving. Evidence for alcohol, tobacco, opioids: limited and inconclusive.
How They Did This
Umbrella review (review of reviews) following registered protocol, searching PubMed, Web of Science, and Epistemonikos for systematic reviews of RCTs on CBD and/or THC for substance use disorders, published 2000-October 2024. 22 systematic reviews included. Quality assessed with AMSTAR 2 tool by two independent researchers.
Why This Research Matters
Despite widespread claims that CBD can help addiction, this highest level of evidence synthesis shows CBD alone does not work for this purpose. The finding that CBD needs to be combined with THC to help cannabis withdrawal specifically has direct implications for treatment guidelines and product development.
The Bigger Picture
The CBD industry frequently markets products for addiction and craving reduction, but this umbrella review shows the evidence does not support CBD monotherapy for any substance use disorder. The specificity of the nabiximols finding, helping with cannabis withdrawal specifically, suggests the mechanism involves both cannabinoid receptors working together rather than CBD alone.
What This Study Doesn't Tell Us
Quality of included systematic reviews varied. Many underlying RCTs had small samples. Different CBD formulations, doses, and durations across studies limit comparison. The field is evolving rapidly and newer trials may change conclusions. Nabiximols findings may not generalize to non-pharmaceutical CBD+THC products.
Questions This Raises
- ?Why does CBD need THC to help with cannabis withdrawal?
- ?Would higher CBD doses show efficacy that lower doses missed?
- ?Could nabiximols help with withdrawal from substances other than cannabis?
Trust & Context
- Key Stat:
- CBD alone: not efficacious for any SUD
- Evidence Grade:
- Strong: umbrella review (highest evidence synthesis level) of 22 systematic reviews with quality assessment.
- Study Age:
- 2025 study
- Original Title:
- Efficacy of cannabidiol alone or in combination with Δ-9-tetrahydrocannabinol for the management of substance use disorders: An umbrella review of the evidence.
- Published In:
- Addiction (Abingdon, England), 120(5), 813-834 (2025)
- Authors:
- Redonnet, Bertrand(2), Eren, Filiz(3), Avenin, Guillaume(2), Melchior, Maria, Mary-Krause, Murielle
- Database ID:
- RTHC-07459
Evidence Hierarchy
Analyzes all available research on a topic using a structured method.
What do these levels mean? →Frequently Asked Questions
Can CBD help with addiction?
This comprehensive umbrella review found CBD alone does not effectively treat any substance use disorder, including cannabis, alcohol, tobacco, or opioid use disorders. However, CBD combined with THC (as nabiximols) shows benefits for cannabis withdrawal symptoms.
Why does CBD not work alone for addiction?
The review did not explain the mechanism, but the finding that CBD+THC works for cannabis withdrawal while CBD alone does not suggests that engaging both CB1 and CB2 receptors simultaneously may be necessary for therapeutic effect in addiction.
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Cite This Study
https://rethinkthc.com/research/RTHC-07459APA
Redonnet, Bertrand; Eren, Filiz; Avenin, Guillaume; Melchior, Maria; Mary-Krause, Murielle. (2025). Efficacy of cannabidiol alone or in combination with Δ-9-tetrahydrocannabinol for the management of substance use disorders: An umbrella review of the evidence.. Addiction (Abingdon, England), 120(5), 813-834. https://doi.org/10.1111/add.16745
MLA
Redonnet, Bertrand, et al. "Efficacy of cannabidiol alone or in combination with Δ-9-tetrahydrocannabinol for the management of substance use disorders: An umbrella review of the evidence.." Addiction (Abingdon, 2025. https://doi.org/10.1111/add.16745
RethinkTHC
RethinkTHC Research Database. "Efficacy of cannabidiol alone or in combination with Δ-9-tet..." RTHC-07459. Retrieved from https://rethinkthc.com/research/redonnet-2025-efficacy-of-cannabidiol-alone
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.