 - Patients must meet Diagnostic and Statistical Manual of Mental Disorders Fourth Edition DSM-IV diagnostic criteria for ADHD any subtype and score at least 1.5 standard deviations above the age norm for their diagnostic subtype using published norms for the Swanson, Nolan and Pelham Questionnaire: Attention-DeficitHyperactivity Disorder Subscale SNAP-IV ADHD Subscale score at both Visit 1 and 2 