"ADHD - attention deficit hyperactivity disorder - is one of the most common mental disorders among children. It
affects 3-5% of all children, perhaps as many as 2 million American children." from National Institute of Mental Health, NIH publication No. 96-3572.
Article by Brenan Koerner discusses a report in Pediatrics which concludes that children treated with Ritalin for ADHD are not more likely to abuse drugs than adults and a New York Times rundown of the report which notes that Ritalin is chemically similar to cocaine.
The US NIH's National Institute of Drug Abuse InfoFact sheet on Ritalin, a drug used to treated ADHD. Contains a summary of ADHD and information about the health affects of Ritalin on those taking it.
Official website from Novartis Pharmaceuticals, the makers of Ritalin. Ritalin is the most widely-known drug that has been approved by the FDA to treat ADHD.
WebMDHealth's Drug Fact Sheet for Ritalin, a drug used to treated ADHD. Fact Sheet provides information on Ritalin's usage, side effects and drug interactions.