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Peripheral and optic neuropathy was usually seen after several months of linezolid therapy (median 5 mo), lactic acidosis after several weeks (median 6 wks), and serotonin syndrome after several days (median 4 days).
 ( adverse event: after ,  Peripheral and optic neuropathy: Effect, lactic acidosis after several weeks (median 6 wks), and serotonin syndrome after several days (median 4 days): Effect, several months of linezolid therapy (median 5 mo): Treatment, linezolid: Treatment.Drug, several months: 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: after ,  Peripheral and optic neuropathy: Effect, lactic acidosis after several weeks (median 6 wks), and serotonin syndrome after several days (median 4 days): Effect, several months of linezolid therapy (median 5 mo): Treatment, linezolid: Treatment.Drug, several months: Treatment.Time_elapsed) 