Migraines and Headaches Resources
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A migraine headache is a form of vascular headache. Migraine headache is caused by vasodilatation (enlargement of blood vessels) that causes the release of chemicals from nerve fibers that coil around the large arteries of the brain. Enlargement of these blood vessels stretches the nerves that coil around them and causes the nerves to release chemicals. The chemicals cause inflammation, pain, and further enlargement of the artery. The increasing enlargement of the arteries magnifies the pain.
Migraine attacks commonly activate the sympathetic nervous system in the body. The sympathetic nervous system is often thought of as the part of the nervous system that controls primitive responses to stress and pain, the so-called "fight or flight" response, and this activation causes many of the symptoms associated with migraine attacks; for example, the increased sympathetic nervous activity in the intestine causes nausea, vomiting,...
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Patients and volunteers receiving single oral doses of 100 to 150 mg of almotriptan did not experience significant adverse events. Six additional normal volunteers received single oral doses of 200 mg without serious adverse events. During clinical trials with AXERT (almotriptan malate) , one patient ingested 62.5 mg in a 5-hour period and another patient ingested 100 mg in a 38-hour period. Neither patient experienced adverse reactions.
Based on the pharmacology of triptans, hypertension or other more serious cardiovascular symptoms could occur after overdosage.
Gastrointestinal decontamination (i.e., gastric lavage followed by activated charcoal) should be considered in patients suspected of an overdose with AXERT (almotriptan malate) . Clinical and electrocardiographic monitoring should be continued for at least 20 hours, even if clinical symptoms are not observed.
It is unknown what effect hemodialysis or peritoneal dialysis has on plasma concentrations of almotriptan.
Do not use AXERT (almotriptan malate) in patients with ischemic heart disease (angina pectoris, history of myocardial infarction, or documented silent ischemia), or in patients who have symptoms or findings consistent with ischemic heart disease, coronary artery vasospasm, including Prinzmetal's variant angina, or other significant underlying cardiovascular disease [see WARNINGS AND PRECAUTIONS].
Do not use AXERT (almotriptan malate) in patients with cerebrovascular syndromes including (but not limited to) stroke of any type as well as transient ischemic attacks [see WARNINGS AND PRECAUTIONS].
Do not use AXERT (almotriptan malate) in patients with peripheral vascular disease including (but not limited to) ischemic bowel disease [see WARNINGS AND PRECAUTIONS].
Because AXERT (almotriptan malate) may increase blood pressure, do not use AXERT (almotriptan malate) in patients with uncontrolled hypertension [see WARNINGS AND PRECAUTIONS].
Do not use AXERT (almotriptan malate) and ergotamine-containing or ergot-derived medications like dihydroergotamine, ergotamine tartrate or methysergide within 24 hours of each other [see DRUG INTERACTIONS].
AXERT (almotriptan malate) and other 5-HT1 agonists (e.g. triptans) should not be administered within 24 hours of each other [see WARNINGS AND PRECAUTIONS].
Do not use AXERT (almotriptan malate) in patients with hemiplegic or basilar migraine.
AXERT (almotriptan malate) is contraindicated in patients with known hypersensitivity to almotriptan or any of its inactive ingredients.
Last reviewed on RxList: 5/29/2009
This monograph has been modified to include the generic and brand name in many instances.
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