A systematic review of 8 RCTs found that endocannabinoid modulators (nabiximols, CBD, PF-04457845) showed broader efficacy for cannabis use disorder than cannabinoid receptor agonists (dronabinol, nabilone).
Addiction specialists seeking pharmacological options for CUD, and researchers developing medications for cannabis dependence.
Endocannabinoid modulators covered almost all aspects of CUD treatment
What the researchers found
Dronabinol reduced withdrawal symptoms but had limited broader efficacy. Nabilone failed to demonstrate efficacy. In contrast, nabiximols, CBD, and PF-04457845 reduced cannabis use and improved abstinence across multiple CUD outcomes. All medications were well-tolerated.
Why it matters
There are no approved medications for cannabis use disorder. This review identifies endocannabinoid modulation (rather than direct receptor agonism) as the more promising pharmacological strategy.
The numbers in context
8 RCTs, 667 participants. Dronabinol: reduced withdrawal only. Nabilone: no efficacy. Nabiximols: reduced use and improved abstinence. CBD: reduced use and improved abstinence. PF-04457845: reduced use and improved abstinence.
How the study worked
Systematic review of 8 randomized controlled trials evaluating medical cannabinoids for CUD (667 total participants). Outcomes assessed: cannabis use, abstinence, withdrawal, craving, treatment retention, and adverse events.
What this study cannot tell us
Only 8 trials available with 667 total participants. Small individual study sizes. Different doses, durations, and outcome measures across trials. Short follow-up periods.
How to read the evidence
Moderate: systematic review of RCTs, but limited by small number and size of included trials.
When this study was published
Published in 2022.
The bigger picture
The distinction between direct agonists (limited efficacy) and endocannabinoid modulators (broader efficacy) mirrors developments in other addiction fields and could shape the future of CUD pharmacotherapy.
Questions still open
- What is the optimal dose and duration for nabiximols or CBD in CUD treatment? Would combining medications improve outcomes? Can these medications help people reduce use if complete abstinence is not the goal?
Common questions
Is there an approved medication for cannabis use disorder?
What is the difference between agonists and modulators?
Was CBD effective for cannabis dependence?
Read the original research
Cannabinoids in the Treatment of Cannabis Use Disorder: Systematic Review of Randomized Controlled Trials.
Frontiers in psychiatry, 13, 867878
Citation
Vuilleumier, Caroline; Scherbaum, Norbert; Bonnet, Udo; Roser, Patrik. (2022). Cannabinoids in the Treatment of Cannabis Use Disorder: Systematic Review of Randomized Controlled Trials.. Frontiers in psychiatry, 13, 867878. https://doi.org/10.3389/fpsyt.2022.867878
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