Marijuana Use Doubles in U.S., But So Do Problems - NBC Bay Area

Marijuana Use Doubles in U.S., But So Do Problems

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    Marijuana use has more than doubled in the U.S. since the beginning of the century — but so have problems for users, including addiction, researchers reported Wednesday.

    Bridget Grant of the National Institute on Alcohol Abuse and Alcoholism (NIAAA) and colleagues found 9.5 percent of U.S. adults used marijuana in 2013, up from 4.1 percent in 2001-2002.

    "There was a large increase in marijuana use disorders during that time," they wrote in the Journal of the American Medical Association's JAMA Psychiatry.

    According to the report, although studies have shown that use or early use of marijuana is associated with increased risk for many outcomes, including cognitive decline, psychosocial impairments, psychiatric symptoms, poor quality of life, use of other drugs, a cannabis-withdrawal syndrome, and addiction risk, fewer Americans view marijuana use as risky.