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Published Online:https://doi.org/10.1176/ajp.127.3.354

Reports of dramatically successful treatment of acute mania with methysergide led the authors to undertake a small study. Twelve patients with acute mania were treated with doses of methysergide that had been reported to be effective. Only one patient recovered; all the others required further therapy. Possible reasons for the failure of methysergide to terminate the manic episode are discussed.

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