Eslicarbazepine acetate (ESL) is an oral pro-drug that is rapidly and extensively metabolized by the liver via a hydrolytic first-pass metabolism into S-Licarbazepine, the biologically active drug. The plasma level of the prodrug remains below quantification. ESL is a potent antiepileptic agent with a spectrum of action essentially limited to partial-onset and generalized tonic-clonic seizures. Its main mechanism of action is by blocking the voltage-gated sodium channel. ESL works by blocking the voltage-gated sodium channel, which play an essential role in the generation and propagation of the epileptic discharge. ESL is well absorbed after oral administration with a bio-availability about 16% higher than that observed after an equivalent dose of Oxcarbazepine (OXC).