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Attention-deficit/hyperactivity disorder (ADHD) is a relatively common disorder, estimated to affect 3% to 6% of children1 and 4.5% of adults.2 Individuals with ADHD, their families, and society as a whole bear the burden of this disorder, even though effective pharmacologic and psychosocial treatments are available. Annual direct medical costs for children with ADHD have been found to be approximately 50% to 75% more than those of children without ADHD,3,4 and family members of patients with ADHD have direct and indirect costs that are almost double those of family members of children without ADHD.4