851
However, the use of lithium should be avoided with any patient who is purging, since it may exacerbate the loss of intracellular potassium, thereby increasing the risk of cardiac toxicity.
 patient who is purging: Subject; loss of intracellular potassium: Effect; increasing the risk of cardiac toxicity: Effect; lithium: Treatment; lithium: Treatment.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: 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:
 patient who is purging: Subject; loss of intracellular potassium: Effect; increasing the risk of cardiac toxicity: Effect; lithium: Treatment; lithium: Treatment.Drug