Lamotrigine has the following roles: 1. Lamotrigine drug is an antiepileptic drug, the instructions clearly state that it is used for children over 12 years of age and adults with partial seizures or generalized tonic clonic seizures monotherapy or adjuvant therapy, and it is actually found that it is now used for broad-spectrum antiepileptic drugs over 2 years of age. If adults have generalized tonic clonic or even myoclonic, lamotrigine can be used; 2. Lamotrigine as a mood stabilizer can be used for type 1 bipolar disorder maintenance treatment, obsessive-compulsive disorder treatment; 3. Lamotrigine is used for neuralgia, such as herpes zoster neuralgia, lamotrigine can be used for herpes zoster neuralgia, but also for neuropathic pain, and its effect on this neuropathic pain is good.