Commonly used painkillers for neuralgia are the following four kinds: 1. Pregabalin, the recommended painkiller, which is relatively expensive but has fewer side effects, and the efficiency of patients after taking it is more than 70%. 2. Carbamazepine, the most effective drug for neuralgia, the efficiency can reach 80%, but the side effects are relatively large, especially in the elderly will be more obvious. The side effects are often dizziness, ataxia, dry mouth, nausea, etc. If the drug is used for a long time, there is a risk of aplastic anemia, liver function damage, psychiatric symptoms, etc. Once a rash appears, the drug should be stopped immediately, which may lead to exfoliative dermatitis and cause patients with life-threatening conditions. 3. gabapentin, this drug has relatively small side effects, but a larger dose is needed to play a pain-relieving effect. The common side effects are increased sleep and unstable walking.4. Phenytoin sodium, this drug is now less used because its effective pain relief interval and poisoning interval overlap, and patients often accidentally overdose, resulting in toxic reactions, such as nystagmus and ataxia.