Enid cycles between several weeks of feeling energetic, talkative, and sleeping less than six hours a day, and several weeks of feeling hopeless, irritable, and sleeping at least ten hours a day. What was Enid most likely diagnosed with?

Enid has recurring periods of unusually high energy, increased talkativeness, and reduced need for sleep, followed by periods of hopelessness and excessive sleep. Alternating elevated and depressive mood episodes are characteristic of bipolar disorder. Depression alone does not account for the energetic periods, and mania refers to an elevated mood episode rather than the full pattern described.

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