Do adults have ADHD? a history lesson

Debates on the legitimacy of a diagnosis of attention deficit hyperactivity disorder (ADHD) in children or adults are still raging1 2 because of a lack of understanding of the history of the disorder. Drug companies have indeed marketed the concept of adult ADHD to potential consumers1—as they did childhood ADHD to parent-teacher associations in the United States during the 1960s and 1970s—but this is only part of the story.