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The itch spread to the arms, abdomen and legs and the patient treated himself with clemastine and the itch disappeared.
 The itch spread to the arms, abdomen and legs and the patient: Subject; himself: Subject; himself: Subject.Gender; itch disappeared: Effect; clemastine: Treatment; clemastine: Treatment.Drug; itch: Treatment.Disorder
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: potential therapeutic event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Treatment.Time_elapsed, Subject.Disorder, Subject.Race, Treatment.Route, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 The itch spread to the arms, abdomen and legs and the patient: Subject; himself: Subject; himself: Subject.Gender; itch disappeared: Effect; clemastine: Treatment; clemastine: Treatment.Drug; itch: Treatment.Disorder