Mental illness is a chronic disease, such as schizophrenia, it is recommended that the duration of medication should not be less than 2-3 years time. The onset of schizophrenia, timely use of high-dose antipsychotic drugs, maintenance treatment at 1-2 months, after the patient’s acute psychiatric symptoms are controlled, continue treatment with the current antipsychotic drugs for about 1 month, gradually reduce the dosage after the condition is relieved, and then conduct maintenance treatment. The duration of maintenance treatment is recommended to be no less than 2 years after the remission of symptoms, in order to reduce the relapse of the disease and hospitalization due to the fluctuation of the disease again, during which the antipsychotic medication can be gradually reduced, but cannot be stopped on its own. By the above time within 2-3 years, the drug can be gradually reduced to discontinuation, that is, the patient takes the time recommended for 2-3 years.