Medical and non-medical cannabis use and risk of prescription opioid use disorder: Findings from propensity score matching.

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DISCUSSION AND CONCLUSIONS:
Medical and non-medical cannabis use both were both associated with increased risks of prescription opioid misuse. Medical cannabis use, however, was not associated with prescription opioid use disorder, and non-medical cannabis was. There appeared to be differential associations between cannabis use and prescription opioid use disorder by cannabis use purpose.