Effectiveness Study of Vilazodone to Treat Depression and to Discover Genetic Markers Associated With Response

Exclusion Criteria

• •A current (or within 6 months prior to the Screening Visit) Axis I disorder of Post Traumatic Stress Disorder, Eating Disorder, Obsessive Compulsive Disorder (Generalized Anxiety Disorder, Social Phobia or Simple Phobia will be allowed).
• •A history of schizophrenia, schizoaffective disorder or bipolar I or II disorder (with a history of hypomanic or manic episodes).
• •DSM-IV-TR criteria for substance abuse (alcohol or drugs) within 3 months prior to Screening Visit or substance dependence within 6 months prior to the Screening Visit.
• •Criteria for any of the following DSM-IV-TR MDD Specifiers: \[a\] With Catatonic Features; \[b\] With Postpartum Onset; \[c\] With Seasonal Pattern.