Clinical data | |
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Trade names | Amerge, Naramig, others |
AHFS/Drugs.com | Monograph |
MedlinePlus | a601083 |
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Routes of administration | Oral |
ATC code | |
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Pharmacokinetic data | |
Bioavailability | 74% |
Metabolism | Hepatic |
Elimination half-life | 5-8 hours |
Excretion | Renal |
Identifiers | |
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CAS Number | |
PubChem CID | |
IUPHAR/BPS | |
DrugBank | |
ChemSpider | |
UNII | |
KEGG | |
ChEBI | |
ChEMBL | |
CompTox Dashboard (EPA) | |
ECHA InfoCard | 100.121.501 |
Chemical and physical data | |
Formula | C17H25N3O2S |
Molar mass | 335.47 g·mol−1 |
3D model (JSmol) | |
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Naratriptan (trade names include Amerge) is a triptan drug marketed by GlaxoSmithKline and is used for the treatment of migraine headaches. It is a selective 5-HT1 receptor subtype agonist.
It was patented in 1987 and approved for medical use in 1997. [1]
Naratriptan is used for the treatment of the acute migraine attacks and the symptoms of migraine, including severe, throbbing headaches that sometimes are accompanied by nausea and sensitivity to sound or light. [2]
A meta-analysis of 53 clinical trials has shown that all triptans are effective for treating migraine at marketed doses and that naratriptan, although less effective than sumatriptan and rizatriptan was more effective than placebo in reducing migraine symptoms at two hours [3] and efficacy was demonstrated in almost two thirds of subjects after four hours of treatment. [4]
Side effects are similar to other triptan medications, with the incidence of side effects reportedly being lower than sumatriptan, and side effects occurring rarely except when above 2.5mg. [5] [6] The risk of triptan side effects is also in general low, according to a systematic review. [7] Side effects include: sensations of warmth/heat, dizziness, drowsiness, tingling of the hands or feet, nausea, dry mouth and unsteadiness, chest pain/pressure, throat pain/pressure, unusually fast/slow/irregular pulse, and mental/mood changes. [6] The tingling and heaviness and sensation of warmth/heat is characteristic of selective 5-HT1 agonists. [6]
The causes of migraine are not clearly understood; however, the efficacy of naratriptans and other triptans is believed to be due to their activity as 5-HT (serotonin) agonists. The biological and pharmacokinetic profile of naratriptan differs significantly from sumatriptan. [6]
In the United States, the Food and Drug Administration (FDA) approved naratriptan on February 11, 1998. [8] It was covered by U.S. Patent no. 4997841 ; the FDA lists the patent as expiring on July 7, 2010. [8] [9]
In July 2010, in the wake of the patent expiration, several drug manufacturers, including Roxane Labs, [10] Sandoz [11] and Teva Pharmaceuticals, [12] announced that they were launching generic Naratriptan medications.
The drug continued to be covered by European patent 0303507 in Germany, Spain, France and the United Kingdom through March 10, 2012, [13] and by Australian patent 611469 in Australia through June 17, 2013. [13] It had previously been covered by Canadian patent 1210968; but both Sandoz and Teva (formerly Novopharm) have offered generic equivalents in Canada since that patent's expiration December 1, 2009. [13]
On December 23, 2014, in response to a request from Health Canada, importers in Canada agreed to quarantine the importation of health products, including generic Naratriptan manufactured for both Sandoz and Teva, from Dr. Reddy's Laboratories in Srikakulam, India. [14] [15] Because Teva and Sandoz are the only approved suppliers of generic Naratriptan in Canada, the quarantine resulted in Naratriptan being placed on the Canadian drug shortage list. [16]
Following the Canadian quarantine, the United Arab Emirates' Ministry of Health also imposed a similar quarantine. [16] [17]
Sumatriptan, sold commonly under brand names Imitrex and Treximet among others, is a medication used to treat migraine headaches and cluster headaches. It is taken orally, intranasally, or by subcutaneous injection. Therapeutic effects generally occur within three hours.
Ergotamine, sold under the brand names Cafergot and Ergomar among others, is an ergopeptine and part of the ergot family of alkaloids; it is structurally and biochemically closely related to ergoline. It possesses structural similarity to several neurotransmitters, and has biological activity as a vasoconstrictor.
Frovatriptan, sold under the brand name Frova, is a triptan drug developed by Vernalis for the treatment of migraine headaches and for short term prevention of menstrual migraine. The product is licensed to Endo Pharmaceuticals in North America and Menarini in Europe.
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.
Rizatriptan, sold under the brand name Maxalt among others, is a medication used for the treatment of migraine headaches. It is taken by mouth.
Zolmitriptan, sold under the brand name Zomig among others, is a triptan used in the acute treatment of migraine attacks with or without aura and cluster headaches. It is a selective serotonin receptor agonist of the 1B and 1D subtypes.
Dihydroergotamine (DHE), sold under the brand names D.H.E. 45 and Migranal among others, 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.
Caffeine/ergotamine is the proprietary name of a medication consisting of ergotamine tartrate and caffeine. This combination is used for the treatment of headaches, such as migraine headache.
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.
Almotriptan is a triptan medication discovered and developed by Almirall for the treatment of heavy migraine headache.
Eletriptan, sold under the brand name Relpax and used in the form of eletriptan hydrobromide, is a second-generation triptan medication intended for treatment of migraine headaches. It is used as an abortive medication, blocking a migraine attack which is already in progress. Eletriptan is marketed and manufactured by Pfizer Inc.
A serotonin receptor agonist is an agonist of one or more serotonin receptors. They activate serotonin receptors in a manner similar to that of serotonin, a neurotransmitter and hormone and the endogenous ligand of the serotonin receptors.
Glatiramer acetate, sold under the brand name Copaxone among others, is an immunomodulator medication used to treat multiple sclerosis. Glatiramer acetate is approved in the United States to reduce the frequency of relapses, but not for reducing the progression of disability. Observational studies, but not randomized controlled trials, suggest that it may reduce progression of disability. While a conclusive diagnosis of multiple sclerosis requires a history of two or more episodes of symptoms and signs, glatiramer acetate is approved to treat a first episode anticipating a diagnosis. It is also used to treat relapsing-remitting multiple sclerosis. It is administered by subcutaneous injection.
Antimigraine drugs are medications intended to reduce the effects or intensity of migraine headache. They include drugs for the treatment of acute migraine symptoms as well as drugs for the prevention of migraine attacks.
Sumatriptan/naproxen, sold under the brand name Treximet among others, is a fixed-dose combination medication used to treat migraines. It is taken by mouth. It contains sumatriptan, as the succinate, a serotonin 5-hydroxytryptamine (5-HT) 1b/1d receptor agonist (triptan); and naproxen as the sodium salt, a member of the arylacetic acid group of nonsteroidal anti-inflammatory drugs (NSAIDs).
Triptans is a word commonly used for a class of anti-migraine drugs that are selective 5-hydroxytryptamine/serotonin1B/1D (5-HT1B/1D) agonists. Migraine is a complex disease which affects about 15% of the population and can be highly disabling. Triptans have advantages over ergotamine and dihydroergotamine, such as selective pharmacology, well established safety record and evidence-based prescribing instructions. Triptans are therefore often preferred treatment in migraine.
Lasmiditan, sold under the brand name Reyvow, is a medication used for the acute treatment of migraine with or without aura in adults. It is not useful for prevention. It is taken by mouth.
Donitriptan (INN) is a triptan drug which was investigated as an antimigraine agent but ultimately was never marketed. It acts as a high-affinity, high-efficacy/near-full agonist of the 5-HT1B and 5-HT1D receptors, and is among the most potent of the triptan series of drugs. Donitriptan was being developed in France by bioMérieux-Pierre Fabre and made it to phase II clinical trials in Europe before development was discontinued.
CP-122,288 is a drug which acts as a potent and selective agonist for the 5-HT1B, 5-HT1D and 5-HT1F serotonin receptor subtypes. It is a derivative of the migraine medication sumatriptan, but while CP-122,288 is 40,000 times more potent than sumatriptan as an inhibitor of neurogenic inflammation and plasma protein extravasation, it is only twice as potent as a constrictor of blood vessels. In human trials, CP-122,288 was not found to be effective as a treatment for migraine, but its selectivity for neurogenic anti-inflammatory action over vasoconstriction has made it useful for research into the underlying causes of migraine.
Fremanezumab, sold under the brand name Ajovy, is a medication used to prevent migraines in adults. It is given by injection under the skin.