“…Lithium (Li) has been the standard prophylactic treatment of BD since 1960s, and it is still the first-line therapy for long-term management of bipolar patients, as highlighted by several observational and randomized clinical trials (Bowden et al, 2010;Hayes et al, 2016;Kessing et al, 2018;Kessing, Hellmund, Geddes, Goodwin, & Andersen, 2011;Lähteenvuo et al, 2018;Malhi et al, 2012;Malhi & Outhred, 2016;Muzina & Calabrese, 2005;Nolen, 2015;Yildiz, Vieta, Tohen, & Baldessarini, 2011). Clinical predictors of good response to Li prophylaxis are BD-I diagnosis, manic index polarity, pure mania, full interepisodic remission, few previous psychiatric hospitalizations, low somatic comorbidity, and positive response to lithium in first-degree relatives (Gershon, Chengappa, & Malhi, 2009;Grof, 2010;Grof et al, 2002;Kleindienst, Engel, & Greil, 2005;Licht, 2012).…”