In the special article “Evidence-based guideline update: Pharmacologic treatment for episodic migraine prevention in adults: Report of the Quality Standards Subcommittee of the American Academy of Neurology and the American Headache Society” by S.D. Silberstein et al. (Neurology 2012;78:1337–1345), there are errors in table 1 and the text on page 1342. Due to changes in the AAN’s LOE classification criteria, pindolol and clonidine should have been labeled as having Level U recommendations and nicardipine should have been listed as having a Level C recommendation. These changes are based on studies cited in the original 2001 guideline; no new studies were found in the literature search for the 2012 update. Please see the corrected table below.The authors regret the errors.
Classification of migraine preventive therapies (available in the United States)
