Experts say cannabis may not be an effective treatment for opioid use disorder. Juno/Stocksy In some states in the United States, opioid use disorder is a qualifying condition for the use of medical marijuana. However, a new study concludes that there is no evidence that cannabis reduces opioid misuse. Experts add that there has never been enough evidence to support the use … [Read more...] about No evidence found that cannabis reduces long term opioid use