New medical research shows that the occurrence of anxiety and depression is related to the decrease of neurotransmitter levels in the brain, and by increasing these neurotransmitters can relieve the symptoms of anxiety and depression and achieve the purpose of treatment, therefore, generally speaking, the duration of medication needs to be more than six months, mostly in 9 months to a year, including the process of dose adjustment, consolidation treatment and gradual reduction, etc., during which premature or sudden discontinuation of medication will cause recurrence or even aggravation of the disease.