7. Classification of Anticonvulsants Felbamate Topiramate Benzodiazepines (diazepam, clonazepam) Barbiturates (phenobarbital) Valproic acid Gabapentin Vigabatrin Topiramate Felbamate Na + : Phenytoin, Carbamazepine, Lamotrigine Topiramate Valproic acid Ca ++ : Ethosuximide Valproic acid Most effective in myoclonic but also in tonic-clonic and partial Clonazepam: for Absence Na + : For general tonic-clonic and partial seizures Ca ++ : For Absence seizures Inhibit EAA Transmission Enhance GABA Transmission Action on Ion Channels