Advocates argue a growing body of scientific literature supports the idea, pointing to a study in the Journal of Pain this year that found chronic pain sufferers significantly reduced their opioid use when taking medical cannabis. And a study published last year in the Journal of the American Medical Association found cannabis can be effective in treating chronic pain and other ailments.
But the research falls short of concluding marijuana helps wean people off opioids - Vicodin, Oxycontin and related painkillers - and heroin, and many medical professionals say it's not enough for them to confidently prescribe it.
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