Objective: To explore the effects of olanzapine on the levels of serum folic acid( FA),homocysteine( Hcy),brain-derived neurotrophic factor( BDNF) in first-episode schizophrenic patients. Method:The first-episode schizophrenic patients( study group,48 cases) were treated with olanzapine for 12 weeks.Before and after treatment,the levels of serum FA,Hcy and BDNF were detected and compared with healthy controls( control group,45 cases). Results: Before the treatment,the levels of serum BDNF,FA in study group ...