"There's already uncertainty over whether the pain relief from marijuana is on the scale of an over-the-counter drug like ibuprofen, or, more powerful, able to relieve the same pain as an opioid. Different sorts of cannabis products might fill different roles. With all of these questions, it's hard for doctors to know when recommending marijuana makes the most sense, even if studies indicate that it works.
More research will be needed before we have answers to those questions, and as the NASEM report, Vandrey, and other researchers Business Insider has interviewed all point out, there are obstacles that make it hard to study marijuana.
But clearly, if it's effective — especially if it can replace more dangerous drugs like opioids — that research is important."
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