Bipolar disorder was formerly called manic depression. It is a form of major affective disorder, or mood disorder, defined by manic or hypomanic episodes (changes from one's normal mood accompanied by high energy states). Bipolar disorder is a serious condition. Mania often involves sleeplessness, sometimes for days, along with hallucinations, psychosis, grandiose delusions, or paranoid rage. In addition, depressive episodes can be more devastating and harder to treat than in people who never have manias or hypomanias.