Goal Achievement After a Change to Vortioxetine in Adults With Major Depressive Disorder

The drug being tested in this study is called Vortioxetine. Vortioxetine is being tested to treat depression in people who have major depressive disorder. This study will look at effectiveness of treatment with vortioxetine in participant's goal achievement for the treatment of major depressive disorder.

The study enrolled 123 patients. Participants will receive:

• Vortioxetine 10 to 20 mg

All participants will be asked to take one tablet at the same time each day throughout the study. The participants will receive a starting dose of 10 mg. The dose may be up-titrated to 20 mg. The dose may then be decreased by 5 mg based on participant's response and tolerability to higher dose as judged by the Investigator.

This multi-center trial will be conducted in Unites States. The overall time to participate in this study is 19 weeks. Participants will make multiple visits to the clinic and will be contacted by telephone for 4 weeks after last dose of study drug for a follow-up assessment.

Inclusion criteria

• Is suffering from Major Depressive Disorder (MDD) as the primary psychiatric diagnosis.
• Has been or is currently being treated with an approved antidepressant (monotherapy) for 6 weeks or longer at an adequate therapeutic dose. Participants currently on an antidepressant at Screening will be discontinued in a manner that is consistent with labeling recommendations and conventional medical practice.
• The antidepressant treatment must be on-going at time of Screening or have been discontinued within the 6 weeks prior to Screening.
• Is considered appropriate for a change in antidepressant medication based on Investigator judgment in collaboration with the participant.
• Has scores on Patient Health Questionnaire (PHQ-9) ≥5 and Clinical Global Impression Scale Severity (CGI-S ≥4).

Exclusion criteria

• Has discontinued prior antidepressant treatment greater than 6 weeks from Screening.
• Is considered to be at imminent risk for hospitalization due to severe depression in the opinion of the investigator. Recent hospitalization due to MDD within 3 months prior to Screening is exclusionary also.
• Has a significant risk of suicide according to the Investigator's clinical judgment or has made an actual suicide attempt in the previous 6 months prior to Screening or scores "yes" on items 4 or 5 in the past 6 months on the Suicidal Ideation section of the Columbia Suicide Severity Rating Scale (C-SSRS).
• Is considered to be treatment resistant, defined as participants with MDD who have not responded to 2 or more separate different antidepressant monotherapy trials of adequate dose and duration (6 weeks or longer) in their current episode. History of only responding to combination or augmentation therapy in previous major depressive episode (MDEs) is also considered evidence of treatment resistant depression.
• Has 1 or more of the following:

• Current or history of: manic or hypomanic episode, schizophrenia or any other psychotic disorder, including schizoaffective disorder, major depression with psychotic features, bipolar depression with psychotic features, obsessive compulsive disorder, mental retardation, organic mental disorders, or mental disorders due to a general medical condition as defined in Diagnostic and Statistical Manual of Mental Disorders (DSM-5) as determined by the investigator.
• Current diagnosis or history of alcohol or other substance abuse or dependence (excluding nicotine or caffeine). The participants must have a negative urine drug screen (UDS) at Screening and Baseline, this includes benzodiazepines and opiates (including oxycodone) for which there is no prescription.
• Presence or history of a clinically significant neurological disorder (including epilepsy) as determined by the investigator.
• Neurodegenerative disorder (Alzheimer disease, Parkinson disease, multiple sclerosis, Huntington disease, etc).
• Has a known history of acute narrow-angle glaucoma or is at risk of acute narrow-angle glaucoma.
• Has a known unstable thyroid disorder or a thyroid-stimulating hormone value outside the normal range based on medical history that is deemed clinically significant by the investigator.
• Has active hepatitis B or a known history of hepatitis C virus.
• Has a known history of human immunodeficiency virus infection.
• Has a history of gastric bypass.
• Has previously or is currently participating in this study or another vortioxetine or LuAA21004 study.
• Is receiving or who have started receiving formal cognitive or behavioral therapy, systematic psychotherapy within 30 days from screening or plan to initiate such therapy during the study.