“…Treatment‐resistant depressive symptoms (TRDS), which are commonly found among patients with chronic bipolar disorder (BPD), have been associated with increased morbidity and disability among such patients (Baldessarini, Salvatore, et al, 2010; Baldessarini, Vieta, Calabrese, Tohen, & Bowden, 2010; Goodwin & Jamison, 2007; Tondo & Baldessarini, 2014; Tondo, Vázquez, & Baldessarini, 2014). The patients with bipolar disease who present with treatment‐resistant depressive symptoms are diagnosed with treatment‐resistant bipolar depression (TRBPD; Halaris, Cantos, Johnson, Hakimi, & Sinacore, 2020). Although consensus guidelines and experts have advocated for the use of monotherapy among patients with BPD, adjunctive therapy is considered for patients who relapse during maintenance treatment (Baldessarini, 2013; Baldessarini, Pérez, Salvatore, Trede, & Maggini, 2014; Tondo et al, 2014).…”