TY - CHAP M1 - Book, Section TI - Antimigraine Medications A1 - Chu, Jason A2 - Nelson, Lewis S. A2 - Howland, Mary Ann A2 - Lewin, Neal A. A2 - Smith, Silas W. A2 - Goldfrank, Lewis R. A2 - Hoffman, Robert S. PY - 2019 T2 - Goldfrank's Toxicologic Emergencies, 11e AB - A migraine headache is a neurovascular disorder often initiated by a trigger and characterized by a headache, which is preceded by an aura 20% of the time. The aura is either unilateral (40%) or bilateral (60%), reversible visual, sensory or other central nervous system symptom that gradually develops and last for minutes preceding the headache. The headache lasts 4 to 72 hours in adults and 1 to 48 hours in children and is typically a pulsatile headache of moderate to severe intensity with associated nausea, photophobia, and/or phonophobia and is typically worsened by routine physical ­activity. The International Headache Society establishes the diagnostic criteria for the various types of migraine, which are divided into multiple groups: migraine without aura (“common migraine”), migraine with aura (“classic migraine”), chronic migraine, complications of migraine, probable migraine, and episodic syndromes that may be associated with migraine. Further subdivisions of migraine with aura include migraine with typical aura with or without headache, migraine with brain stem aura, hemiplegic migraine, and retinal or ophthalmic migraine.41 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1163012322 ER -