Analog Classroom Study Comparison of ADDERALL XR With STRATTERA in Children Aged 6-12 With ADHD

Inclusion Criteria: * Primary diagnosis of ADHD combined subtype or predominantly hyperactive-impulsive subtype, based on psychiatric evaluation * Capable of understanding and following classroom instructions * Generally functioning academically at age-appropriate levels Exclusion Criteria: * ADHD, predominantly inattentive subtype * Controlled or uncontrolled comorbid psychiatric diagnosis (except ODD) with significant symptoms such as PTSD, psychosis, bipolar disease, severe OCD, severe depressive or severe anxiety disorder * Documented history of aggressive behavior serious enough to preclude participation in regular classroom activities * Documented allergies or intolerance to either of the active treatments or tricyclic antidepressants