The drug used in absence seizures and having a narrow spectrum of antiepileptic activity is:: (A) Lamotrigine, (B) Ethosuximide, (C) Sodium valproate, (D) Primidone
Answer is B. (Ref: KDT 6/e p406, 407) Ethosuximide is useful only in the treatment of absence seizures (petit mal epilepsy). Valproic acid and lamotrigine are broad spectrum antiepileptic drugs.