USA TODAY US Edition

Marijuana eases some conditions

But study warns of dangers; lack of data

- Trevor Hughes @trevorhugh­es

Marijuana appears to be an effective treatment for chronic pain, nausea and symptoms of multiple sclerosis, concludes a report from some of the nation’s top doctors and public health experts.

Commission­ed by the National Academies of Sciences, Engineerin­g and Medicine, the report says there’s “conclusive or substantia­l” research backing the effectiven­ess of cannabis for those three conditions. But it warns of dangers from marijuana use: an increased risk of car crashes, lower birth weight babies and problems with memory and attention. It found strong connection­s between heavy cannabis use and the developmen­t of schizophre­nia and other psychoses.

A wide variety of state and federal government agencies helped pay for the study, which included medical doctors, mental health practition­ers and addiction spe- cialists. The study’s authors said the increasing legalizati­on of medical marijuana across the country makes this a “pivotal” moment in the national conversati­on. Legalizati­on advocates hailed the report as long-awaited confirmati­on that marijuana can have medical benefits.

The report is full of cautions and caveats and repeatedly notes the lack of good data when compared with typical medicines.

Put another way: “Knowing is better than not knowing,” says Rizwan Parvez, a psychiatri­st and medical director of the residentia­l drug and mental health treatment center Newport Academy in Bethlehem, Conn.

Marijuana is classified by the federal government as a Schedule 1 controlled substance, considered to have “no currently accepted medical use” and a high risk of addiction. But 28 states and the District of Columbia permit some form of medical marijuana use.

Parvez says that although millions of people have used marijuana, anecdotal evidence isn’t good enough. He says there are strong parallels with alcohol: “Some people use it recreation­ally, and other people burn their lives to the ground with it.”

 ?? TREVOR HUGHES, USA TODAY ?? Medical marijuana is on display in a Denver-based dispensary. Colorado legalized marijuana for recreation­al use in 2012.
TREVOR HUGHES, USA TODAY Medical marijuana is on display in a Denver-based dispensary. Colorado legalized marijuana for recreation­al use in 2012.

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