We propose to conduct a 12-month, placebo-controlled, double-blind, parallel-group trial of citalopram added to treatment with any oral or injectable second-generation antipsychotic plus standardized psychoeducation. Subjects will be 100 patients ages 16-40 with first episode schizophrenia or schizophreniform disorder with onset before age 35 who have received at least 4 weeks and fewer than 16 cumulative weeks of antipsychotic medication, have not been treated with an SSRI within four weeks and do not meet criteria for major depression or significant suicidal ideation. This study will be conducted by the Schizophrenia Program of the NYU Langone Medical Center and at the Psychiatry Outpatient Clinic of Bellevue Hospital located in New York, NY