Eletriptan has no significant affinity or pharmacological activity at adrenergic α1, α2, or β; dopaminergic D1 or D2; muscarinic; or opioid receptors. Eletriptan could be efficiently co-administrated with nitric oxide synthase (NOSs) inhibitors for the treatment of NOS-dependent diseases (US patent US 2007/0254940). Two theories have been proposed to explain the efficacy of 5-HT1 receptor agonists in migraine. One theory suggests that activation of 5-HT1 receptors located on intracranial blood vessels, including those on the arteriovenous anastomoses, leads to vasoconstriction, which is correlated with the relief of migraine headache. The other hypothesis suggests that activation of 5-HT1 receptors on sensory nerve endings in the trigeminal system results in the inhibition of pro-inflammatory neuropeptide release. Side effects
Common side effects include hypertension, tachycardia, headache, dizziness, drowsiness and symptoms similar to angina pectoris. Severe allergic reactions are rare. Contraindications
Eletriptan is contraindicated in patients with various diseases of the heart and circulatory system, such as angina pectoris, severe hypertension, and heart failure, as well as in patients that have had a stroke or heart attack. This is due to the unusual side effect of coronary vasoconstriction due to serotonin 5HT1B antagonism, which can precipitate a heart attack in those already at risk. It is also contraindicated in severe renal or hepatic impairment due to its extensive liver metabolism through CYP3A4. Interactions
Strong inhibitors of the liver enzyme CYP3A4, such as erythromycin and ketoconazole, significantly increase blood plasma concentration of eletriptan and should be separated by at least 72 hours.
Ergot alkaloids, such as dihydroergotamine, add to the drugs hypertensive effect and should be separated by at least 24 hours. Additional chemical names
Merck Index: 3-[[(2R)-1-Methyl-2-pyrrolidinyl]methyl]-5-[2-(phenylsulfonyl)ethyl]-1H-indole
5-[2-(benzenesulfonyl)ethyl]-3-(1-methylpyrrolidin-2(R)-ylmethyl)-1H-indole
(R)-5-[2-(phenylsulfonyl)ethyl]-3-[(1-methyl-2-pyrrolidinyl)methyl]-1H-indole

Society and culture
Brand names
It is sold in the United States, Canada, Australia, and the United Kingdom under the brand name Relpax, and in several other countries under the brand name Relert. References
External links
"Eletriptan". Drug Information Portal. U.S. National Library of Medicine. "Eletriptan hydrobromide". Drug Information Portal. U.S. National Library of Medicine.