Dihydroergotamine (n {Respell|dy|HY|droh-ur|GOT|ə-meen}; brand names D.H.E. 45 and Migranal) is an ergot alkaloid used to treat migraines. It is a derivative of ergotamine. It is administered as a nasal spray or injection and has an efficacy similar to that of sumatriptan. Nausea is a common side effect. It has similar actions to the triptans, ac...
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http://en.wikipedia.org/wiki/Dihydroergotamine
(from the article `drug`) ...constituents of ergot, ergotamine and ergonovine are the most important. The main effect of ergotamine is to constrict blood vessels, sometimes so ...
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http://www.britannica.com/eb/a-z/d/49
<chemical> 9,10-dihydro-12'-hydroxy-2'-methyl-5'-(phenylmethyl)ergotaman-3',6',18-trione. A derivative of ergotamine prepared by the catalytic hydrogenation of ergotamine. It is used as a vasoconstrictor, specifically for the therapy of migraine. ... Pharmacological action: analgesics, non-narcotic, vasoconstrictor agents. ... Chemical name: ...
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http://www.encyclo.co.uk/local/20973
(di-hi″dro-әr-got´ә-mēn) hydrogenated ergotamine, an alpha-adrenergic blocking agent and vasoconstrictor used as ergotamine mesylate in treatment of migraine; administered intramuscularly, subcutaneously, intravenously, or intranasally.
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http://www.encyclo.co.uk/local/21001
an ergot alkaloid, CHNO, used in the treatment of various types of migraine headache.
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https://www.infoplease.com/dictionary/dihydroergotamine
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