Compared with traditional antiepileptic drugs, it has the following advantages: 1. A new mechanism of action. Binds to vesicle SV2A to assist neurotransmitter release. 2. 100% bioavailability, starting dose = therapeutic dose, fast onset of action, can take effect on the first day. 3. No interaction with other antiepileptic drugs as it does not go through the hepatic CPY system. 4.Low side effects. No cognitive and weight changes, especially for children. 5. Effective in intractable epilepsy. The disadvantage is that it is more expensive.