A Six-Week Flexible Dose Study Evaluating the Efficacy and Safety of Geodon in Patients With Bipolar I Depression.

• Drug: Placebo
  
  Subjects will start on placebo and remain on placebo for six weeks. All cards for the Placebo arm will be 0 mg bid.
• Drug: Geodon (Ziprasidone)
  
  Ziprasidone flexible dosing treatment arm (20-80 mg bid). For the Ziprasidone arm, the Baseline card will contain 20 mg bid (one 20 mg capsule) for days 1-2 and 40 mg bid (two 20 mg capsules) for days 3-6. Cards A, B, C, and D will contain either 20 mg bid (one 20 mg capsule), 40 mg bid (two 20 mg capsules), 60 mg bid (one 60 mg capsule), or 80 mg bid (one 60 mg capsule and one 20 mg capsule).

• Active Comparator: Ziprasidone 20 and 60mg
  
  For the Ziprasidone arm, the Baseline card will contain 20 mg bid (one 20 mg capsule) for days 1-2 and 40 mg bid (two 20 mg capsules) for days 3-6. Cards A, B, C, and D will contain either 20 mg bid (one 20 mg capsule), 40 mg bid (two 20 mg capsules), 60 mg bid (one 60 mg capsule), or 80 mg bid (one 60 mg capsule and one 20 mg capsule).
  Intervention: Drug: Geodon (Ziprasidone)
• Placebo Comparator: Placebo
  
  Intervention: Drug: Placebo

Inclusion Criteria:

• Subjects must have a primary diagnosis of Bipolar I Disorder, most recent episode depressed, with or without rapid cycling, without psychotic features, as defined in DSM-IV-TR (296.5X) and confirmed by a structured Mini International Neuropsychiatric Interview (MINI)

Exclusion Criteria:

• Subjects with a DSM-IV TR diagnosis of schizophrenia (295.XX), schizoaffective disorder (295.70), schizophreniform disorder (295.40), delusional disorder (297.1), or psychotic disorder NOS (298.9).
• Subjects with other DSM-IV TR Axis I or Axis II disorder (in addition to Bipolar I disorder) are ineligible if the comorbid condition is clinically unstable, requires treatment, or has been a primary focus of treatment within the 6 month period prior to screening.