Antidepressant withdrawal reactions usually occur when treatment is abruptly stopped and are less common during medication reduction. Five syndromes: 1. Balance disorders, such as dizziness, vertigo, ataxia. 2. Gastrointestinal symptoms, such as nausea and vomiting. 3, flu-like symptoms, such as fatigue, drowsiness, myalgia, chills. 3.Sensory disorders, such as abnormal sensation, electric shock sensation. 4.Sleep disorders, such as insomnia, excessive dreaming. Somatic symptoms are more common than psychological symptoms, where the most common somatic symptoms are dizziness, abnormal sensation, drowsiness and nausea, but excessive dreaming, insomnia and headache are more common. The risk of withdrawal reactions is influenced by the following risk factors: 1. The risk is higher for high doses and long duration of medication. 2, Children and adolescents are more likely to be out. 3, Those without active metabolites are more likely to have withdrawal reactions than those with active metabolites. 4. Those who stop the drug suddenly are more likely to have withdrawal reactions than those who reduce the drug slowly. 5, the influence of drug type and other factors. Such as monoamine oxidase inhibition morpholino withdrawal symptoms are particularly severe.