- Adult subjects, 18 years of age or older with a diagnosis of recurrent,
moderate-to-severe MDD without psychotic features (DSM-IV 296.3x, with a HAMD17 score
>= to 22 and CGI-S >=4.
- MDD must be the primary psychiatric disorder that motivated the subject to seek
treatment and the current episode must be at least 1 month in duration but no longer
than 6 months in duration.
- Subjects who, in the investigator's judgement, would require treatment with
electroconvulsive therapy (ECT), or antipsychotics, or would require a change in
intensity of psychotherapy, or subjects who would require treatment with any other
psychotherapeutic drugs during the course of the trial.
- Subjects who have ever been diagnosed with Panic Disorder, Post-Traumatic Stress
Disorder, Obsessive-Compulsive Disorder, Bipolar Affective Disorder, Schizophrenia,
Schizoaffective Disorder or othe Psychotic Disorder, MDD with a seasonal pattern, or
Dissociative Disorders per DSM-IV criteria.