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Clinical Trial
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.
Methylphenidate in hyperactive boys with comorbid tic disorder: II. Short-term behavioral effects in school settings.
In this study, 11 prepubertal hyperactive boys with tic disorder received placebo and three doses of methylphenidate (0.1, 0.3, and 0.5 mg/kg) for 2 weeks each, under double-blind conditions. Each boy was observed for approximately 20 hours in the school setting (classroom seatwork activities, lunchroom, and playground). Results showed that methylphenidate effectively suppressed hyperactive/disruptive behaviors in the classroom and physical aggression in the lunchroom and on the playground. Methylphenidate also reduced the occurrence of vocal tics in the classroom and the lunchroom. None of the motor tic measures revealed drug effects, but the lowest mean rate of motor tics occurred on the 0.3 mg/kg dose. On an operationally defined minimal effective dose, only one boy experienced motor tic exacerbation.
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