The Canadian Network for Mood and Anxiety Treatments guidelines for the treatment of bipolar disorder outline a step-wise approach to helping patients with bipolar depression, including detailing which pharmacotherapies should be attempted as a first-line therapy, before moving on to second- and third-line therapies.1

  • Hierarchy of first-line treatments for acute bipolar depression: quetiapine, lurasidone with lithium or valproate, lithium, lamotrigine, lurasidone, adjunctive lamotrigine.
  • Hierarchy of second-line treatments for acute bipolar depression: valproate, a selective-serotonin reuptake inhibitor (SSRI) or adjunctive bupropion, electroconvulsive therapy, cariprazine, olanzapine–fluoxetine combination.

Reference:
1. Yatham LN, Kennedy SH, Parikh SV, et al. Canadian Network for Mood and Anxiety Treatments (CANMAT) and International Society for Bipolar Disorders (ISBD) 2018 guidelines for the management of patients with bipolar disorder. Bipolar Disord 2018; 20 (2): 97–170.