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The case presented here documents adverse cardiac effects in a 28-year-old man who intentionally ingested 24 mg of risperidone--4 times the recommended dose.
 ( adverse event: ingested ,  28-year-old man: Subject, 28-year-old: Subject.Age, man: Subject.Gender, adverse cardiac effects: Effect, 24 mg of risperidone: Treatment, 24 mg: Treatment.Dosage, risperidone: 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: ingested ,  28-year-old man: Subject, 28-year-old: Subject.Age, man: Subject.Gender, adverse cardiac effects: Effect, 24 mg of risperidone: Treatment, 24 mg: Treatment.Dosage, risperidone: Treatment.Drug) 