Patients are randomly assigned to one of three conditions: 1) a double-blind psychopharmacological treatment (fluoxetine); 2) a manualized treatment which focuses on "processing" traumatic memories (EMDR); or 3) a placebo control group. After 8 weeks of active treatment, subjects are evaluated, cease treatment, and are assessed again after another 8 weeks and at 6 months in order to evaluate the long-term effects. Training raters remain blind to the subjects' treatment condition throughout the study. Treatment outcome is assessed with a multi-modal psychological and biological assessment battery including: 1) standard psychological tests for PTSD (CAPS); 2) neuroendocrine function (cortisol); and 3) psychophysiological response to traumatic scripts (pre-post changes in heart social and occupational functioning). Treatment adherence is monitored throughout the study.