Methysergide is a prescription drug formerly used for prophylaxis of cluster headaches/migraine headaches, but is no longer recommended due to retroperitoneal/retropulmonary fibrosis. It is also used in carcinoid syndrome to treat severe diarrhea. It may also be used in the treatment of serotonin syndrome. References: Valic M, Pecotic R, Pavlinac Dodig I, Valic Z, Stipica I, Dogas Z. Intermittent hypercapnia-induced phrenic long-term depression is revealed after serotonin receptor blockade with methysergide in anaesthetized rats. Exp Physiol. 2016 Feb 1;101(2):319-31. doi: 10.1113/EP085161. Epub 2015 Dec 20. PubMed PMID: 26621042.

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CAS：129-49-7