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We consider asterixis to be an easily overlooked sign of neurotoxicity, which may occur even at low or moderate dosage levels, if certain drugs as lithium or clozapine are used in combination with CBZ.
 ( adverse event: occur ,  asterixis: Effect, even at low or moderate dosage levels: Treatment, certain drugs as lithium or clozapine are used in combination with CBZ: Treatment, CBZ: Treatment.Drug, lithium: Treatment.Drug, clozapine: Treatment.Drug, low or moderate dosage: Treatment.Dosage, CBZ: Combination.Drug, lithium: Combination.Drug, CBZ: Combination.Drug, clozapine: Combination.Drug) 
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: occur ,  asterixis: Effect, even at low or moderate dosage levels: Treatment, certain drugs as lithium or clozapine are used in combination with CBZ: Treatment, CBZ: Treatment.Drug, lithium: Treatment.Drug, clozapine: Treatment.Drug, low or moderate dosage: Treatment.Dosage, CBZ: Combination.Drug, lithium: Combination.Drug, CBZ: Combination.Drug, clozapine: Combination.Drug) 