More bad news from the U.S. drug wars: Misuse of prescription opioid painkillers by American adults more than doubled from the early 2000s to 2013, a new government study says.

Rates of addiction to powerful painkillers such as OxyContin and Vicodin also swelled during that time, according to the U.S. National Institute on Alcohol Abuse and Alcoholism (NIAAA).

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