• Stewart J Tepper, Hans-Christoph Diener, Messoud Ashina, Jan Lewis Brandes, Deborah I Friedman, Uwe Reuter, Sunfa Cheng, Jon Nilsen, Dean K Leonardi, Robert A Lenz, and Daniel D Mikol.
• From the Geisel School of Medicine at Dartmouth (S.J.T.), Hanover, NH; Department of Neurology (H.-C.D.), University of Duisburg-Essen, Germany; Department of Neurology (M.A.), Danish Headache Center, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Department of Neurology (J.L.B.), Vanderbilt University School of Medicine; Nashville Neuroscience Group (J.L.B.), TN; Neurology and Neurotherapeutics and Ophthalmology (D.I.F.), University of Texas Southwestern Medical Center, Dallas; Department of Neurology (U.R.), Charité Universitätsmedizin Berlin, Germany; and Amgen Inc (S.C., J.N., D.K.L., R.A.L., D.D.M.), Thousand Oaks, CA. sjtepper@gmail.com.
• Neurology. 2019 May 14; 92 (20): e2309-e2320.

ObjectiveTo determine the effect of erenumab, a human anti-calcitonin gene-related peptide receptor monoclonal antibody, in patients with chronic migraine and medication overuse.MethodsIn this double-blind, placebo-controlled study, 667 adults with chronic migraine were randomized (3:2:2) to placebo or erenumab (70 or 140 mg), stratified by region and medication overuse status. Data from patients with baseline medication overuse at baseline were used to assess changes in monthly migraine days, acute migraine-specific medication treatment days, and proportion of patients achieving ≥50% reduction from baseline in monthly migraine days.ResultsOf 667 patients randomized, 41% (n = 274) met medication overuse criteria. In the medication overuse subgroup, erenumab 70 or 140 mg groups had greater reductions than the placebo group at month 3 in monthly migraine days (mean [95% confidence interval] -6.6 [-8.0 to -5.3] and -6.6 [-8.0 to -5.3] vs -3.5 [-4.6 to -2.4]) and acute migraine-specific medication treatment days (-5.4 [-6.5 to -4.4] and -4.9 [-6.0 to -3.8] vs -2.1 [-3.0 to -1.2]). In the placebo and 70 and 140 mg groups, ≥50% reductions in monthly migraine days were achieved by 18%, 36% (odds ratio [95% confidence interval] 2.67 [1.36-5.22]) and 35% (odds ratio 2.51 [1.28-4.94]). These clinical responses paralleled improvements in patient-reported outcomes with a consistent benefit of erenumab across multiple measures of impact, disability, and health-related quality of life. The observed treatment effects were similar in the non-medication overuse subgroup.ConclusionsErenumab reduced migraine frequency and acute migraine-specific medication treatment days in patients with chronic migraine and medication overuse, improving disability and quality of life.Clinicaltrialsgov IdentifierNCT02066415.Classification Of EvidenceThis study provides Class II evidence that erenumab reduces monthly migraine days at 3 months in patients with chronic migraine and medication overuse.Copyright © 2019 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.

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