ttention-deficit/hyperactivity disorder (ADHD) is characterized by problems regulating attention and controlling behavior across social settings.1 Though predominantly viewed as a childhood disorder, there is growing recognition that symptoms often persist into adulthood.2 While the etiology of ADHD remains a matter of debate, there is a wealth of literature as to its effects. Persons with ADHD experience academic and occupational underachievement relative to their peers, have impaired social relationships with higher rates of divorce, and have higher rates of traffic violations and accidents resulting in injury.3,4 Untreated ADHD in children is also associated with an increased risk for substance abuse problems later in life.
5Treatment options for ADHD include both behavioral and pharmacological therapies, with the latter more broadly applied and dominated by the use of psychostimulants. 6,7 In 2003, a nonstimulant therapy became widely available, offering another pharmacologic alternative to the stimulant (STIM) group. U.S. Food and Drug Administration (FDA) approval for adult use of atomoxetine (ATX, Strattera) was granted after 2 studies of 10 weeks duration, each of which showed improvements on the Conners Adult ADHD Rating Scales.7 ATX differs from STIMs both in the mechanism of action and in adverse effects. Like other nonstimulants used for ADHD such as tricyclic antidepressants and bupropion, 8 ATX can be safely used in patients with comorbid anxiety disorders, does not exacerbate tics, and lacks potential for abuse.
9New treatment choices create new challenges. Physicians must balance the risks and benefits of expanding treatment alternatives to optimally care for their patients. In the early days following the approval of a new medication, this task may be ABSTRACT OBJECTIVE: To determine which factors are associated with use of atomoxetine (ATX) relative to stimulant medications (STIMs) for treatment initiation in adults with attention-deficit/hyperactivity disorder (ADHD). A similar exploratory analysis of the use of ATX versus STIMs in children has been published previously.METHODS: This was an exploratory analysis using a retrospective observational cohort design applied to administrative pharmacy and medical claims from an integrated managed care database. Patients were identified if they had at least 1 administrative claim with a diagnosis for ADHD. Treatment "initiation" was defined as a new prescription for an ADHD medication preceded by 3 months without similar therapy. Two separate analyses were done, one comparing medication starts for ATX with those of any STIM, the other comparing starts of ATX with long-acting stimulants (LA-STIMs). Logistic regression analyses of prior-year administrative claims were used to compare the frequencies of differential predictors of the use of medication.RESULTS: There were 10,359 patients aged >18 years who initiated ATX or a STIM between April and December of 2003 and had at least 1 claim with a diagnosis for ADHD (International Classification of Diseases...