Medical marijuana vs. opioid abuse: New study questions the connection

Medical marijuana vs. opioid abuse: New study questions the connection

Enlarge / Legal cannabis for sale in a tobacco shop in Italy. (credit: Stefano Guidi | Getty Images)

In the US, federal law has severely restricted our ability to study any potential medical properties of cannabis. But, given some limited studies and a lot of anecdotal stories, a number of states have gone ahead and legalized medical marijuana. This has allowed some population-level studies of what’s going on in the states, but those have faced additional complications, like rules that differ from state to state and an ongoing legalization of recreational use confusing the picture.

Just how confusing all this can be was driven home this week by the release of a paper that suggests that one of medical marijuana’s greatest successes was illusory. A couple of early studies indicated that states that had legalized medical marijuana use saw drops in opioid-related deaths. The new research replicates those results but

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