ADHD drug have been found to ineffective in the long term by a recent NIH Study. These drugs have also been found to stunt growth and weight of children taking them. The FDA recently issued warning in the form of medication guides concerning heart problems and psychiatric symptoms potentially caused by these drugs.
These warnings were issued on Adderall, Concerta, Daytrana, Desoxyn, Dexedrine, Focalin, Metadate, Methylin, Ritalin and Strattera.