Epidemiologic studies suggest approximately 38% of migraineurs need preventive therapy, but only 3%–13% currently use it.1 In 2000, the American Academy of Neurology (AAN) published guidelines for migraine prevention.2,3 Since then, new clinical studies have been published on the efficacy and safety of migraine preventive therapies. This guideline seeks to assess this new evidence to answer the following clinical question: For patients with migraine, which pharmacologic therapies are proven effective for prevention, as measured by reduced migraine attack frequency, reduced number of migraine days, or reduced attack severity? This article addresses the safety and efficacy of pharmacologic therapies for migraine prevention.
Separate guidelines are available for botulinum toxin. The 2008 guideline included a Level B recommendation ineffective for treatment of episodic migraine. A new guideline is in development. An updated guideline on nonsteroidal anti-inflammatory drugs5 and complementary alternative treatments has been approved for publication as a companion to this guideline.that botulinum toxin was probably.
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