Effect of Ketamine vs. Active Placebo on Suicidal Ideation in Depressed Inpatients With Major Depressive Disorder or Bipolar Depression.

TAU includes any current treatment a patient is receiving from their primary care practitioner. In the major depressive disorder (MDD) group, TAU may include a newly initiated or longstanding antidepressant. In the bipolar depression (BD) group, TAU may include a mood stabilizer such as lithium or valproate that is a first or second line agent as per Canadian Network for Mood and Anxiety Treatments (CANMAT) guidelines (Yatham et al., 2013).