Every medication has side effects, the magnitude of which is related to the proportion of side effects occurring, their severity, and individual circumstances. Antiepileptic drugs are the main form of treatment for epilepsy and need to be taken for a long period of time, so it is inevitable that some side effects will occur. There are quite a variety of anti-epileptic drugs, and the following side effects are common. 1. Gastrointestinal function: nausea, vomiting, dyspepsia, diarrhea, gastrointestinal cramps, loss of appetite, etc. may occur. 2. Nervous system: dizziness, headache, convulsions, memory loss, blurred consciousness, ataxia, etc. may occur. Diplopia, blurred vision, nystagmus, etc. may occur in the optic nerve. 3. Hematological system: It may cause anemia, coagulation dysfunction and bleeding tendency, such as nosebleed, gum bleeding. 4. Psychosomatic: It may cause depression, drowsiness, depression, emotional instability, insomnia and forgetfulness. 5. Allergic reactions: some antiepileptic drugs can cause skin rash, exfoliative dermatitis, maculopapular rash, drug fever, etc.. Although antiepileptic drugs have certain toxic side effects, but not all people will have side effects, physical weakness, liver and kidney underlying disease people have a higher proportion of side effects, and relatively serious. Patients with epilepsy should choose appropriate anti-epileptic drugs under the guidance of a professional physician, and should not choose drugs on their own according to the size of the side effects.