Used primarily in the treatment of seizures associated with Lennox-Gastaut syndrome, a severe form of epilepsy. It functions as an anticonvulsant by modulating sodium channels in nerve cells, helping to stabilize electrical activity in the brain. Often prescribed as an add-on therapy in patients aged four years and older. Its application is especially valuable in managing multiple seizure types, including atonic, tonic, and myoclonic seizures. Due to its unique mechanism, it is considered when other antiepileptic drugs are not fully effective or cause intolerable side effects.