2571
The wide use of phenytoin during the recent tuberculosis epidemic makes it imperative to suspect this drug interaction in patients exhibiting clinical features that might be related to phenytoin toxicity.
 ( adverse event: suspect ,  patients: Subject, phenytoin toxicity: Effect, phenytoin: Treatment, tuberculosis: Treatment.Duration, phenytoin: 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: suspect ,  patients: Subject, phenytoin toxicity: Effect, phenytoin: Treatment, tuberculosis: Treatment.Duration, phenytoin: Treatment.Drug) 