1743
Based on our experience and on previously published data, serum ammonia levels appear to be indicated in all ED patients on valproic acid therapy who present with altered mental status.
 all ED patients: Subject; altered mental status: Effect; valproic acid therapy: Treatment; ED: Treatment.Disorder; valproic acid: Treatment.Drug
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: adverse event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Subject.Disorder, Treatment.Route, Subject.Race, Treatment.Time_elapsed, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 all ED patients: Subject; altered mental status: Effect; valproic acid therapy: Treatment; ED: Treatment.Disorder; valproic acid: Treatment.Drug