2309
Although the literature on the use of risperidone in elderly patients with dementia consists largely of uncontrolled trials, case reports, and chart reviews, it appears that this agent is effective for managing agitation in this population and does so with a low frequency of extrapyramidal symptoms (EPS).
 elderly patients with dementia: Subject; elderly: Subject.Age; use of risperidone: Treatment; risperidone: Treatment.Drug; dementia: Treatment.Disorder
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: potential therapeutic event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Treatment.Time_elapsed, Subject.Disorder, Subject.Race, Treatment.Route, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 elderly patients with dementia: Subject; elderly: Subject.Age; use of risperidone: Treatment; risperidone: Treatment.Drug; dementia: Treatment.Disorder