Note: In putting this together, I've taken most of the material from the working version of the DSM-V, which is the forthcoming new edition of the Diagnostic and Statistical Manual of Mental Disorders of the American Psychiatric Society. The criteria for a manic episode are still subject to revision, but the basics are solid.
Criterion A: A distinct period of abnormally and persistently elevated, expansive or irritable mood that lasts at least a week and is present most of the day, nearly...

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