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In this article, the authors report a 7-year-old male patient who presented with orofacial and limb dyskinesia after his first dose of methylphenidate treatment for a diagnosis of attention-deficit/hyperactivity disorder; he was also receiving sodium valproate treatment for epilepsy.
 ( adverse event: after ,  a 7-year-old male patient: Subject, 7-year-old: Subject.Age, male: Subject.Gender, orofacial and limb dyskinesia: Effect, first dose of methylphenidate: Treatment, attention-deficit/hyperactivity disorder: Treatment.Disorder, first dose: Treatment.Time_elapsed, methylphenidate: Treatment.Drug) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: adverse event,potential therapeutic event, Arguments type: Treatment.Disorder,Treatment.Time_elapsed,Treatment.Dosage,Subject.Race,Treatment.Drug,Treatment.Route,Subject.Disorder,Treatment.Freq,Treatment,Effect,Subject.Population,Treatment.Duration,Combination.Drug,Subject,Subject.Age,Subject.Gender. 
Text: {0} 
Answer:
 ( adverse event: after ,  a 7-year-old male patient: Subject, 7-year-old: Subject.Age, male: Subject.Gender, orofacial and limb dyskinesia: Effect, first dose of methylphenidate: Treatment, attention-deficit/hyperactivity disorder: Treatment.Disorder, first dose: Treatment.Time_elapsed, methylphenidate: Treatment.Drug) 