NIH studies link ADHD to decreased dopamine in brain

08/6/2007 | Reuters

A pair of NIH studies ties attention deficit hyperactivity disorder to decreased dopamine activity in the brain, explaining a predilection to substance abuse in people with ADHD. One researcher said taking drugs such as nicotine or alcohol temporarily increase dopamine concentration in the brain of people with ADHD, the same effect created by Ritalin. The studies also found a version of a dopamine gene appears to be associated with ADHD.

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