precio priligy 30 mg A number of other characteristics of depressive illness including seasonal depression, atypical depressive features, suicidality, irritability, anxiety or substance use comorbidity, postpartum mood episodes, and brief recurrent depressive episodes have been described in the literature as potential correlates of a bipolar diathesis; none have proved to be robust or pathognomonic of a BD diagnosis, as opposed to a unipolar diagnosis