Used as an anticonvulsant medication for the treatment of partial-onset seizures in patients with epilepsy. It functions as a synaptic vesicle protein 2A (SV2A) ligand, modulating neurotransmitter release and reducing neuronal hyperexcitability. Due to its high affinity for SV2A and favorable pharmacokinetic profile, it is often prescribed as an adjunctive therapy in adults and children. Its isomeric purity contributes to enhanced efficacy and reduced side effects compared to related compounds.