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Aggressive Behaviour in Children With Tourette's Syndrome (TS) and Comorbid Attention Deficit Hyperactivity Disorder (ADHD)

This study is currently Recruiting

October 2006 By University Health Network, Toronto

First Recieved on September 7, 2005

Last Updated on February 27, 2007

Sponsor: University Health Network, Toronto
Collaborators: The Hospital for Sick Children
Information provided by: University Health Network, Toronto
Identifier: NCT00152750


In the present study, we examine the question ?Will day-time aggression in children improve when their night-time sleep is treated with pharmacological intervention (i.e. clonidine)?? There is considerable anecdotal evidence that clonidine may provide an effective alternative to neuroleptics for treating aggression in children -- first by improving the overall quality of their sleep, and second by providing a safer and more readily tolerated medication with fewer side-effects and a greater probability of long-term compliance. This study uses a double blind placebo controlled design to gather scientific evidence that will help elucidate the mechanisms underlying this treatment effect and will help clarify the relationship between sleep disorders and aggression in children. Our results are expected to help physicians make informed treatment decisions regarding the use of clonidine to improve the quality of sleep and possibly treat problems with aggression in their pediatric patients

Study Type: Interventional
Study Design: Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Double-Blind, Primary Purpose: Treatment


Ages Eligible for Study:9 Years
Genders Eligible for Study:Both
Accepts Healthy Volunteers:Accepts Healthy Volunteers

Inclusion Criteria: - Males or females - Meet the DSM-III-R criteria for Tourette syndrome based on the assessment of a study psychiatrist and the presence of comorbid Attention Deficit Hyperactivity Disorder (ADHD) according to DSM-IV diagnostic criteria - A negative history of psychiatric illness that requires treatment. - Medication free for a minimum period of six (6) weeks at the time of entry into the study - Between the ages of 9:0 years and 14:11 years - An initial screening score on the Children?s Aggression Scale-Parents Version of at least +1SD above average on at one or more of the four subscales. - Adequate English language comprehension and production (sufficient to respond to questions from the investigators) - Be able and willing to cooperate with the study protocol - All parents/caregivers will provide consent and subjects (children/adolescents) will give their informed assent prior to participating in any study procedures. - Known history of sleep disturbances (children will be considered to experience sleep disturbances if their sleep latency regularly exceeds 30 minutes; to have a general poor quality of sleep if there are frequent awakenings (>2 nightly), nightmares or restlessness; or if they experience difficulty awakening, marked difficulty with arousal or consistent oversleeping. For the purposes of this study, a disturbance in sleep is considered only if it is chronic (lasting more than one month) and frequent (two or more times per week). Exclusion Criteria: *Evidence of Pervasive Developmental Disorder, known seizure disorder, history of severe head trauma, post-traumatic stress disorder, depression, known organic basis for a sleep disorder and/or an estimated Full Scale Intellectual Quotient below 85


  • Investigator: Robyn J Stephens, PhD.C.Psych. - Principal Investigator - Youthdale Treatment Centres


  • Youthdale Treatment Centres

    Toronto, Ontario M5B 1T8 Canada

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