Bipolar type 1

Bipolar I disorder (BP-I; pronounced "type one bipolar disorder") is a bipolar spectrum disorder characterized by at least one manic or mixed episode. Bipolar I disorder sometimes occurs along with episodes of hypomania or major depression as well. It is a type of bipolar disorder, and conforms to the classic concept of manic-depressive illness, which can include psychosis during mood episodes. The difference with bipolar II disorder is that the latter requires that the individual must never have experienced a full manic episode - only less severe hypomanic episode(s).