Definition:
Mixed episode refers to a type of bipolar I disorder. Bipolar disorder symptoms exist on a spectrum, ranging from highs (mania) and lows (depression). A person with a mixed episode is simultaneously experiencing these highs and lows, meeting the criteria for both a manic episode and a major depressive episode.
According to the DSM-IV-TR, a mixed episode in bipolar I disorder occurs when:
A. The criteria are met both for a manic episode and for a major depressive episode (except for duration) nearly every day during at least a 1-week period.
B. The mood disturbance is sufficiently severe to cause marked impairment in occupational functioning or in usual social activities or relationships with others, or to necessitate hospitalization to prevent harm to self or others, or there are psychotic features.
C. The symptoms are not due to the direct physiological effects of a substance (e.g., a drug of abuse, a medication, or other treatment), or a general medical condition (e.g., hyperthyroidism)
Note: Mixed-like episodes that are clearly caused by somatic antidepressant treatment (e.g., medication,, electroconvulsive therapy, light therapy) should not count toward a diagnosis of Bipolar I Disorder.
Source:
American Psychiatric Association. "Diagnostic and Statistical Manual of Mental Disorders, 4th ed., text revision" 2000 Washington, DC: Author.
