Efficacy and Safety Study of Vortioxetine (Lu AA21004) in Adults With Major Depressive Disorder

Inclusion Criteria

• Suffers from a major depressive episode recurrent as the primary diagnosis according to the American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR) criteria.
• Has a Montgomery Åsberg Depression Rating Scale (MADRS) total score of 26 or greater at Screening and Baseline Visits.
• Has a Clinical Global Impression - Severity of Illness (CGI-S) score of 4 or greater at Screening and Baseline Visits.

Exclusion Criteria

• Has previously participated in a Lu AA21004 clinical study.
• Has 1 or more the following:
• Any current psychiatric disorder other than Major Depressive Disorder as defined in the DSM-IV
• Current or past history of: manic or hypomanic episode, schizophrenia or any other psychotic disorder defined in the DSM-IV-TR.
• Diagnosis of alcohol or other substance disorder (except nicotine and caffeine) as defined in the DSM-IV-TR that has not been in sustained full remission for at least years prior to screening (participant must also have negative urine drug screen prior to Baseline).
• Presence or history of a clinically significant neurological disorder (including epilepsy)
• Neurodegenerative disorder.
• Any Axis II disorder that might compromise the study.
• Has a thyroid stimulating hormone value outside the normal range at the Screening Visit that is deemed clinically significant by the investigator.
• Has clinically significant abnormal vital signs as determined by the investigator.
• Has an abnormal Electrocardiogram.
• Has an alanine aminotransferase, aspartate aminotransferase or total bilirubin level greater than 1.5 times the upper limits of normal.
• Has a previous history of cancer that had been in remission for less than 5 years prior to the first dose of study medication.
• Has a disease or takes medication that, in the opinion of the investigator, could interfere with the assessments of safety, tolerability, or efficacy.
• Has a known history of or currently has increased intraocular pressure or is at risk of acute narrow-angle glaucoma.
• Has a clinically significant unstable illness, for example, hepatic impairment or renal insufficiency, or a cardiovascular, pulmonary, gastrointestinal, endocrine, neurological, rheumatologic, immunologic, infectious, skin and subcutaneous tissue disorders, or metabolic disturbance. For the purposes of this protocol the following conditions are considered unstable due to the potential impact on assessment of MDD response: pain disorder, chronic fatigue syndrome, fibromyalgia, and obstructive sleep apnea.
• Has a significant risk of suicide according to the investigator's opinion.