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We present two cases of anaphylaxis under anaesthesia where return of spontaneous circulation was refractory to epinephrine, but occurred following the administration of the alpha-agonist metaraminol.
 return of spontaneous circulation: Effect; epinephrine: Treatment; administration of the alpha-agonist metaraminol: Treatment; anaphylaxis under anaesthesia: Treatment.Disorder; metaraminol: Treatment.Drug; epinephrine: Treatment.Drug; epinephrine: Combination.Drug; metaraminol: Combination.Drug
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:
 return of spontaneous circulation: Effect; epinephrine: Treatment; administration of the alpha-agonist metaraminol: Treatment; anaphylaxis under anaesthesia: Treatment.Disorder; metaraminol: Treatment.Drug; epinephrine: Treatment.Drug; epinephrine: Combination.Drug; metaraminol: Combination.Drug