“…Results, regarding age are contradictory (13,15,21,24). Early onset of disorder, short duration of disorder, frequent hospitalizations, history of manic switch, depression in the Erst episode, mixed episode, agitation, psychomotor retardation, atypical features, cyclothymic orhyperthymic temperament, serotonin gene polymorphism and low thyroid stimulating hormone (TSH) are found in patients with manic switch (7,9,(11)(12)(13)16,21,(23)(24)(25)(26)29,(31)(32)(33). Findings on rapid cycling, type of bipolar disorder, comorbid substance use disorder, and number of manic and depressive episodes before the switch are contradictory (9,(11)(12)(13)15,21,23,24,32,34,36).…”