The National Institute on Drug Abuse estimates that drug and tobacco use costs American society an additional 400 billion dollars a year.

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And the National Institute on Drug Abuse held a conference last year to explore the possible role of physical activity in substance abuse prevention.

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The National Institute on Drug Abuse (NIDA) and the National Institute on Alcohol Abuse and Alcoholism (NIAAA) joined together a few years ago to try to change that with a public health campaign centered around a documentary, Addiction, that aired on HBO and is available as a public health campaign as well.

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According to Frank Vocci, a director of medications development at America's National Institute of Drug Abuse, several drugs are on the way that block the drug-induced craving associated with cocaine.

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