LAUSR

Marijuana has some identifiable positive effects on health, but evidence for many other claimed benefits is inconclusive, says a huge 12 January report from the US National Academies of Sciences, Engineering, and Medicine. The report considers more than 10,000 studies, finding enough evidence for three therapeutic effects: on chronic pain, chemotherapy-induced nausea and muscle spasms related to multiple sclerosis. But use of the drug can increase the risk of mental-health conditions such as schizophrenia, says the report. The assessment recommends more research on marijuana, but notes the regulatory barriers to research in the United States, including the drug's classification as a substance with no " accepted medical use " .