Comparison of the effect of Atomoxetine and psychoeducation with placebo and psychoeducation after 10 weeks of treatment

Inclusion Criteria:

• Meet the criteria for ADHD of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) as well as severity criteria. Diagnosis is assessed by the investigator's clinical evaluation as well as administration of the K-SADS-PL structured interview.
• Meet a symptom severity threshold of 1.5 standard deviations above age and sex norms for their diagnostic subtype on the ADHDRS-IV-Parent: Investigator-Administered and Scored (ADHDRS-IV-Parent:Inv) This severity threshold must be met at Visit 1 and maintained at Visit 2.
• Be at least 7 years of age, but not yet have reached their 16th birthday prior to Visit 1, when informed consent is obtained.
• For female subjects of child-bearing potential only, test negative for pregnancy at the time of enrollment based on a urine pregnancy test and agree to use a reliable method of birth control.

Exclusion Criteria:

• Weigh less than 20 kg at study entry
• Have a documented history of Bipolar Disorder or any history of psychosis or pervasive development disorder (autistic spectrum disorder).
• Are pregnant or breastfeeding.
• Are at serious suicidal risk as assessed by the investigator.
• Have been treated previously for ADHD with pyschostimulants such as Methylphenidate or Ritalin