Excerpt from: Sharp Brains (click for full article)
The misuse and abuse of prescription medication is a growing concern. I remember speaking with colleagues 15–20 years ago as reports about the nonmedical use of stimulant medications used to treat ADHD (nonmedical use is defined as use by individuals without a prescription) were first appearing in the media. At the time, these were generally thought to be isolated incidents that were being over-dramatized in the press.
It has become clear, however, that this is not the case today and that the nonmedical use of ADHD meds, as well as misuse by individuals for whom medication is prescribed, is an important problem. At the link above is a brief overview and summary of research on these issues.