(DSM-V, 2013, pgs. 123-154)The main characteristic is a manic episode that consists of an abnormal, persistently elevated, expansive, or irritable mood and a persistent rise in energy or activity that will last for most of the day, almost every day, for at least a week and accompanied by at least three symptoms. Some of the symptoms consist of inflated self-esteem, decreased need for sleep, more talkative, racing thoughts, distracted, increase in goal-directed activity, or an increase in risky behavior (e.g., sexual indiscretions, shopping sprees, or foolish business investments). If the mood is irritable rather than elevated then at least four of the symptoms must be present.
Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-V). Arlington, VA, American Psychiatric Association, 2013.