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A 74-year-old man received oral administration of pilsicainide, a pure sodium channel blocker with slow recovery kinetics, to convert paroxysmal atrial fibrillation to sinus rhythm and developed loss of consciousness two days later.
 ( adverse event: developed ,  A 74-year-old man: Subject, 74-year-old: Subject.Age, man: Subject.Gender, loss of consciousness: Effect, oral administration of pilsicainide: Treatment, two days later: Treatment, oral: Treatment.Route, pilsicainide: Treatment.Drug, paroxysmal atrial fibrillation: Treatment.Disorder, two days later: Treatment.Time_elapsed) 
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: developed ,  A 74-year-old man: Subject, 74-year-old: Subject.Age, man: Subject.Gender, loss of consciousness: Effect, oral administration of pilsicainide: Treatment, two days later: Treatment, oral: Treatment.Route, pilsicainide: Treatment.Drug, paroxysmal atrial fibrillation: Treatment.Disorder, two days later: Treatment.Time_elapsed) 