Medical marijuana: good evidence for some diseases, weak for others

A jar of medical marijuana is displayed at the medical marijuana farmers market in Los AngelesBy Andrew M. Seaman (Reuters Health) – Moderate- or high-quality evidence supports the use of marijuana for some medical conditions, but not for others, according to a fresh review of past research. After reviewing 80 randomized trials that included nearly 6,500 people, researchers found moderate support for using marijuana to treat chronic pain and muscle spasms and involuntary movements. The evidence wasn't as strong to support marijuana's use for nausea and vomiting due to chemotherapy, sleep disorders, HIV-related weight loss and Tourette syndrome.

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