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Methysergide

Methysergide, sold under the brand names Deseril and Sansert, is a monoaminergic medication of the ergoline and lysergamide groups which is used in the prophylaxis and treatment of migraine and cluster headaches. It has been withdrawn from the market in the United States and Canada due to adverse effects. It is taken by mouth. Methysergide is no longer recommended as a first line treatment protocol by international headache societies, hospitals, and neurologists in private practice, for migraines or cluster headaches as side effects were first reported with long-term use in the late 1960s, and ergot-based treatments fell out of favor for the treatment of migraines with the introduction of triptans in the 1980s. Methysergide is used exclusively to treat episodic and chronic migraine and for episodic and chronic cluster headaches. Methysergide is one of the most effective medications for the prevention of migraine, but is not intended for the treatment of an acute attack, it is to be taken daily as a preventative medication. Methysergide has been known as an effective treatment for migraine and cluster headache for over 50 years. A 2016 investigation by the European Medicines Agency due to long-held questions about safety concerns was performed. To assess the need for continuing availability of methysergide, the International Headache Society performed an electronic survey among their professional members. The survey revealed that 71.3% of all respondents had ever prescribed methysergide and 79.8% would prescribe it if it were to become available. Respondents used it more in cluster headache than migraine, and reserved it for use in refractory patients. The European Medicines Agency concluded "that the vast majority of headache experts in this survey regarded methysergide a unique treatment option for specific populations for which there are no alternatives, with an urgent need to continue its availability." This position was supported by the International Headache Society.

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Related concepts (3)
Triptan
Triptans are a family of tryptamine-based drugs used as abortive medication in the treatment of migraines and cluster headaches. This drug class was first commercially introduced in the 1990s. While effective at treating individual headaches, they do not provide preventive treatment and are not considered a cure. They are not effective for the treatment of tension–type headache, except in persons who also experience migraines. Triptans do not relieve other kinds of pain.
5-HT receptor
5-HT receptors, 5-hydroxytryptamine receptors, or serotonin receptors, are a group of G protein-coupled receptor and ligand-gated ion channels found in the central and peripheral nervous systems. They mediate both excitatory and inhibitory neurotransmission. The serotonin receptors are activated by the neurotransmitter serotonin, which acts as their natural ligand. The serotonin receptors modulate the release of many neurotransmitters, including glutamate, GABA, dopamine, epinephrine / norepinephrine, and acetylcholine, as well as many hormones, including oxytocin, prolactin, vasopressin, cortisol, corticotropin, and substance P, among others.
Migraine
Migraine (UK, US) is a genetically influenced complex neurological disorder characterized by episodes of moderate-to-severe headache, most often unilateral and generally associated with nausea and light and sound sensitivity. Other characterizing symptoms may include nausea, vomiting, cognitive dysfunction, allodynia, and dizziness. Exacerbation of headache symptoms during physical activity is another distinguishing feature.

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