<qa>  What is the profile of the atypical antipsychotic, Ziprasidone?Atypical antipsychotics have shown promise in the treatment of depression and anxiety, which are prominent symptoms of PTSD. The profile of the atypical antipsychotic, ziprasidone Geodon, suggests possible anxiolytic and antidepressant properties. This research will assess the potential effectiveness of Geodon in civilian men and women who suffer from severe PTSD. Response to ziprasidone or placebo will be measured by Clinician Administered PTSD Scale CAPS and Treatment Outcomes PTSD Scale TOP-8. 