Amino acid transmitters Glutamate (GLU) –excitation of neurons GABA (Gamma-amino butyric acid) – inhibition of neurons Choices of antiepileptic drugs First line Second line Partial seizure Carbamazepin e Iamotrigine, phenytoin, tiagabine, topiramate, valproate, gabapentin Generalised tonic-clonic Valproate Carbamazepin e Iamotrigine, phenobarbito ne, phenytoin, topiramate Absence (petit mal) seizures Valproate Ethosuximide Clobazam, clonazepam, iamotrigine Status epilepticus IV diazepam/ midozolam/clonazepam