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In addition, ethambutol rarely causes visual loss during the early period or when given at lower doses.
 visual loss: Effect; ethambutol: Treatment; during the early period or when given at lower doses: Treatment; ethambutol: Treatment.Drug; early period: Treatment.Time_elapsed; lower doses: Treatment.Dosage
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:
 visual loss: Effect; ethambutol: Treatment; during the early period or when given at lower doses: Treatment; ethambutol: Treatment.Drug; early period: Treatment.Time_elapsed; lower doses: Treatment.Dosage