Cannabinoids for the Treatment of Opioid Use Disorder: Where is the Evidence?

With the growing public interest in the potential therapeutic benefits of cannabis and cannabinoids in the treatment of opioid use disorder (OUD), some states have now either added or proposed to add OUD as an indication for their state's medical marijuana program. However, these initiatives are based on weak evidence which at present do not support the listing of cannabis or cannabinoids as a treatment for OUD. Nevertheless, studying the potential therapeutic applications of carefully chosen components of cannabis or cannabinoids to treat specific aspects of OUD is not without scientific merit. Given the high rates of treatment discontinuation among those taking medications for OUD, interventions that further improve clinical outcomes are especially needed. The potential therapeutic applications of cannabis and cannabinoids in the treatment of OUD are worthy of further study, but it should be conducted with the same rigor that we expect of all pharmaceutical products. Until we have more research to show their efficacy, policy makers and clinicians should refrain from portraying cannabis and cannabinoids as evidence-based treatments for OUD.