Positive Effects of Methylphenidate on Inattention and Hyperactivity in Pervasive Developmental Disorders: An Analysis of Secondary Measures

David J. Posey, Michael G. Aman, James T. McCracken, Lawrence Scahill, Elaine Tierney, L. Eugene Arnold, Benedetto Vitiello, Shirley Z. Chuang, Mark Davies, Yaser Ramadan, Andrea N. Witwer, Naomi B. Swiezy, Pegeen Cronin, Bhavik Shah, Deirdre H. Carroll, Christopher Young, Courtney Wheeler, Christopher J. McDougle

Research output: Contribution to journalArticlepeer-review

94 Scopus citations


Background: Methylphenidate has been shown elsewhere to improve hyperactivity in about half of treated children who have pervasive developmental disorders (PDD) and significant hyperactive-inattentive symptoms. We present secondary analyses to better define the scope of effects of methylphenidate on symptoms that define attention-deficit/hyperactivity disorder (ADHD) and oppositional defiant disorder (ODD), as well as the core autistic symptom domain of repetitive behavior. Methods: Sixty-six children (mean age 7.5 y) with autistic disorder, Asperger's disorder, and PDD not otherwise specified, were randomized to varying sequences of placebo and three different doses of methylphenidate during a 4-week blinded, crossover study. Methylphenidate doses used approximated .125, .25, and .5 mg/kg per dose, twice daily, with an additional half-dose in the late afternoon. Outcome measures included the Swanson, Nolan, and Pelham Questionnaire revised for DSM-IV (ADHD and ODD scales) and the Children's Yale-Brown Obsessive Compulsive Scales for PDD. Results: Methylphenidate was associated with significant improvement that was most evident at the .25- and .5-mg/kg doses. Hyperactivity and impulsivity improved more than inattention. There were not significant effects on ODD or stereotyped and repetitive behavior. Conclusions: Convergent evidence from different assessments and raters confirms methylphenidate's efficacy in relieving ADHD symptoms in some children with PDD. Optimal dose analyses suggested significant interindividual variability in dose response.

Original languageEnglish (US)
Pages (from-to)538-544
Number of pages7
JournalBiological psychiatry
Issue number4
StatePublished - Feb 15 2007


  • Asperger's disorder
  • autism
  • hyperactivity
  • inattention
  • methylphenidate
  • pervasive developmental disorder
  • stimulants

ASJC Scopus subject areas

  • Biological Psychiatry


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