Negative symptoms are a core part of schizophrenia. A European Psychiatric Association guideline on the treatment of negative symptoms in schizophrenia recommends social skills training, exercise, and rehabilitation interventions such as supported employment and cognitive remediation, particularly for those who also show cognitive impairment.1
For pharmacological treatment, low-dose amisulpride (50-300 mg/day) and cariprazine have the best evidence among antipsychotic drugs.2
Adding an antidepressant may be an efficacious adjunctive treatment.3