Long-term tolerability and nonvascular safety of erenumab, a novel calcitonin gene-related peptide receptor antagonist for prevention of migraine: A pooled analysis of four placebo-controlled trials with long-term extensions. (December 2019)

• Record Type: Journal Article
• Authors: Ashina, Messoud; Kudrow, David; Reuter, Uwe; Dolezil, David; Silberstein, Stephen; Tepper, Stewart J; Xue, Fei; Picard, Hernan; Zhang, Feng; Wang, Andrea; Zhou, Yanchen; Hong, Frank; Klatt, Jan; Mikol, Daniel D
• Is Part Of: Cephalalgia. Volume 39:Number 14(2019)
• Page Start: 1798
• Page End: 1808
• Publication Date: 2019-12
• Subjects: Erenumab -- safety -- migraine; Headache -- Periodicals; 616.8491
• DOI: 10.1177/0333102419888222
• Languages: English
• ISSNs: 0333-1024

Abstract

Background: Efficacy and safety of erenumab have been evaluated in a comprehensive clinical development program resulting in approval for migraine prevention in over 40 countries to date. Methods: This integrated safety analysis included four double-blind randomized trials and their extensions (up to three-plus years). Safety endpoints included exposure-adjusted patient incidences of adverse events, serious adverse events, and anti-erenumab antibodies. Results: In all, 2375 of the patients randomized across the four studies received at least one dose of erenumab (70 mg or 140 mg), with cumulative exposure of 2641.2 patient-years. Exposure-adjusted adverse event rates during the double-blind treatment phase were similar to placebo, with the exception of injection-site reactions (17.1 vs. 10.8 per 100 patient-years), constipation (7.0 vs. 3.8 per 100 patient-years), and muscle spasm (2.3 vs. 1.2 per 100 patient-years). During the long-term extensions, adverse events reported were similar to those observed during the double-blind treatment phase, and rates of injection site reactions, constipation, and muscle spasm were reported at lower rates than in the double-blind treatment phase. There were two deaths reported, both confounded by pre-existing conditions. Conclusions: This pooled safety analysis revealed a favorable and stable adverse event profile over time for erenumab with more than three years of exposure. Trial registration: ClinicalTrials.gov NCT01952574, NCT02483585, NCT02456740, NCT02066415, and NCT02174861.