 Each subject will be asked to receive a physical exam, give medical history information, and receive a diagnostic interview prior to participation in the study. After being randomly assigned to treatment, subjects will have interview or questionnaire assessments at weeks 2, 4, 6, 8, 12, 16, 20, 24, 28 and 32. Based solely on the degree of response as measured by the PTSD Checklist a questionnaire that will be administered at each study visit, the dosage of study medication fluoxetine or placebo capsules will be adjusted by a pre-determined schedule. 