A randomized, placebo-controlled study of once-daily atomoxetine in the school setting in children with ADHD

J Am Acad Child Adolesc Psychiatry. 2005 Jul;44(7):647-55. doi: 10.1097/01.chi.0000163280.47221.c9.


Objective: Five studies have demonstrated the effectiveness of atomoxetine compared with placebo in reducing symptoms of attention-deficit/hyperactivity disorder (ADHD) based on parent reports. The primary objective of this clinical trial was to assess the efficacy of once-daily atomoxetine compared with placebo using teacher reports.

Method: One hundred fifty-three patients aged 8-12 years were randomly assigned to receive once-daily atomoxetine or placebo in a 2:1 ratio for 7 weeks. ADHD symptoms at school were primarily assessed by baseline-to-endpoint change on the Attention-Deficit/Hyperactivity Disorder Rating Scale-IV-Teacher Version: Investigator administered and scored (ADHDRS-IV-Teacher:Inv) as rated by investigators using teacher reports.

Results: ADHDRS-IV-Teacher:Inv total scores were significantly lower for children treated with atomoxetine compared with those treated with placebo (p = .001). Similar results were observed for the inattentive (p = .016) and hyperactive/impulsive (p < .001) ADHDRS-IV-Teacher:Inv subscales, the clinician-rated Clinical Global Impressions severity scale (p = .001), the Conners Global Index-Teacher scale (p = .008), and the Conners Parent Rating Scale-Revised: Short Form ADHD Index T-Score (p < .001). Discontinuations due to adverse events were low in both groups (atomoxetine 5.9%, placebo 0%, p = .096).

Conclusions: This study extends previous results based on parent reports showing that once-daily administration of atomoxetine is safe and effective in improving ADHD symptoms in children and demonstrates that outcomes at school are similar when symptoms are reported by teachers.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Atomoxetine Hydrochloride
  • Attention Deficit Disorder with Hyperactivity / diagnosis
  • Attention Deficit Disorder with Hyperactivity / drug therapy*
  • Child
  • Double-Blind Method
  • Drug Administration Schedule
  • Female
  • Humans
  • Male
  • Propylamines / administration & dosage
  • Propylamines / therapeutic use*
  • Schools
  • Serotonin Uptake Inhibitors / administration & dosage
  • Serotonin Uptake Inhibitors / therapeutic use*
  • Severity of Illness Index


  • Propylamines
  • Serotonin Uptake Inhibitors
  • Atomoxetine Hydrochloride