<prompt> The drug used in absence seizures and having a narrow spectrum of antiepileptic activity is:LamotrigineEthosuximideSodium valproatePrimidone  <response>: Ref: KDT 6e p406, 407 Ethosuximide is useful only in the treatment of absence seizures petit mal epilepsy. Valproic acid and lamotrigine are broad spectrum antiepileptic drugs. 