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Types of Bipolar Disorder

Bipolar I Disorder
Characterised by the occurrence of one or more Manic Episodes or Mixed Episodes. A Manic Episode is defined by a distinct period during which there is an abnormally and persistently elevated, expansive or irritable mood. The mood disturbance must last for at least 1 week (unless hospitalisation is required). A Mixed episode is characterised by a period of time (lasting at least 1 week) in which the criteria are met both for a Manic Episode and a Major Depressive episode. Untreated manic episodes generally last three to six months and depressive episodes generally last six to 12 months without treatment.

Bipolar II Disorder
Characterised by the occurrence of one or more Major Depressive Episodes accompanied by at least one Hypomanic Episode (mild Manic Episode). The presence of a Manic or Mixed Episode excludes the diagnosis of Bipolar II Disorder.of Bipolar II Disorder.