[Objective] To explore the efficacy of risperidone combined mirtazapine for improving negative symptom and cognitive impairment in schizophrenia. [Methods] Totally 60 patients with schizophrenia who were treated with risperidone and had prominent negative symptoms(negative subscale scores of PANSS〉30) were randomly divided into risperidone combined with mirtazapine(30mg/d) group(study group, n = 30) and single risperidone group(control group, n =30). The treatment duration was 12 weeks. Positive and negative PANSS and cognitive measure...