Throughout the past couple decades, there have been an increase in the number of ADHD diagnoses. This has also occurred while there was a large scale campaign to encourage the use of different types of drugs. There are a few different reasons why this may have occurred, but it has certainly fueled some speculation. It has also increased debate over whether it is appropriate to market these types of drugs in certain ways.

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ADHD diagnoses soared amid 20-year drug marketing campaign – NBCNews.com