Also Known As: Bipolar I, Bipolar 1
Bipolar I disorder is a mood disorder that is 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 sub-diagnosis of bipolar disorder, and conforms to the classic concept of manic-depressive illness.
The essential feature of bipolar I disorder is a clinical course characterized by the occurrence of one or more manic episodes or mixed episodes (DSM-IV-TR, 2000). Often, individuals have had one or more major depressive episodes. One episode of mania is sufficient enough to make the diagnosis of bipolar disorder, the patient may or may not have history of major depressive disorder. Episodes of substance-induced mood disorder due to the direct effects of a medication, or other somatic treatments for depression, drug abuse, or toxin exposure, or of mood disorder due to a general medical condition need to be excluded before a diagnosis of bipolar I disorder can be made. In addition, the episodes must not be better accounted for byschizoaffective disorder or superimposed on schizophrenia, schizophreniform disorder, delusional disorder, or a psychotic disorder not otherwise specified.