title: Risperidone in the treatment of disruptive behavioral symptoms in children with autistic and other pervasive developmental disorders.
abstract: OBJECTIVE
  To investigate the efficacy and safety of risperidone for the treatment of disruptive behavioral symptoms in children with autism and other pervasive developmental disorders (PDD).
  
  
  METHODS
  In this 8-week, randomized, double-blind, placebo-controlled trial, risperidone/placebo solution (0.01-0.06 mg/kg/day) was administered to 79 children who were aged 5 to 12 years and had PDD. Behavioral symptoms were assessed using the Aberrant Behavior Checklist (ABC), Nisonger Child Behavior Rating Form, and Clinical Global Impression-Change. Safety assessments included vital signs, electrocardiogram, extrapyramidal symptoms, adverse events, and laboratory tests.
  
  
  RESULTS
  Subjects who were taking risperidone (mean dosage: 0.04 mg/kg/day; 1.17 mg/day) experienced a significantly greater mean decrease on the irritability subscale of the ABC (primary endpoint) compared with those who were taking placebo. By study endpoint, risperidone-treated subjects exhibited a 64% improvement over baseline in the irritability score almost double that of placebo-treated subjects (31%). Risperidone-treated subjects also exhibited significantly greater decreases on the other 4 subscales of the ABC; on the conduct problem, insecure/anxious, hyperactive, and overly sensitive subscales of the Nisonger Child Behavior Rating Form (parent version); and on the Visual Analog Scale of the most troublesome symptom. More risperidone-treated subjects (87%) showed global improvement in their condition compared with the placebo group (40%). Somnolence, the most frequently reported adverse event, was noted in 72.5% versus 7.7% of subjects (risperidone vs placebo) and seemed manageable with dose/dose-schedule modification. Risperidone-treated subjects experienced statistically significantly greater increases in weight (2.7 vs 1.0 kg), pulse rate, and systolic blood pressure. Extrapyramidal symptoms scores were comparable between groups.
  
  
  CONCLUSIONS
  Risperidone was well tolerated and efficacious in treating behavioral symptoms associated with PDD in children.
authors.affiliation: IWK Health Centre, and Dalhousie University, Halifax, Nova Scotia, Canada. sarah.shea@iwk.nshealth.ca
authors.forename: Sarah
authors.initials: S
authors.lastname: Shea
authors.forename: Atilla
authors.initials: A
authors.lastname: Turgay
authors.forename: Alan
authors.initials: A
authors.lastname: Carroll
authors.forename: Miklos
authors.initials: M
authors.lastname: Schulz
authors.forename: Herbert
authors.initials: H
authors.lastname: Orlik
authors.forename: Isabel
authors.initials: I
authors.lastname: Smith
authors.forename: Fiona
authors.initials: F
authors.lastname: Dunbar
mesh_terms: D000374:Aggression / Q000187:drug effects; D014150:Antipsychotic Agents / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*; D001321:Autistic Disorder / Q000188:drug therapy; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000188:drug therapy*; D002675:Child, Preschool; D018492:Dopamine Antagonists / Q000627:therapeutic use; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007508:Irritable Mood / Q000187:drug effects; D008297:Male; D018967:Risperidone / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*; D012702:Serotonin Antagonists / Q000627:therapeutic use; D016896:Treatment Outcome
chemical_list: D014150:Antipsychotic Agents; D018492:Dopamine Antagonists; D012702:Serotonin Antagonists; D018967:Risperidone