A 24‑week prospective, multicenter, real‑world study on eptinezumab’s effectiveness and safety in migraine prevention (EMBRACE II)

Introduction: We evaluated the effectiveness, tolerability, and safety of eptinezumab in preventing high-frequency episodic migraine (HFEM) and chronic migraine (CM) over 24 weeks in real-world. We also assessed its impact during the first treatment week, in patients failing monoclonal antibodies targeting the calcitonin gene-related peptide (anti-CGRP mAbs), and the effects of dose escalation to 300 mg in patients requiring enhanced control. Methods: EMBRACE II is a multicenter (n = 22), prospective, 24-week, real-world study involving consecutive patients with HFEM or CM who had failed > 3 preventive treatments. Eptinezumab (100 mg, with the option for escalation to 300 mg at week 12) was administered quarterly. Primary endpoint: change in monthly migraine days (MMD), for HFEM or monthly headache days (MHD), for CM, between weeks 21–24 and baseline. Secondary endpoints: changes in monthly analgesic intake (MAI), Numerical Rating Scale (NRS), Headache Impact Test (HIT-6), Migraine Disability Assessment Scale (MIDAS), Migraine Interictal Burden Scale (MIBS-4), and responder rates. Results: Of the 215 participants who had received ≥ 1 eptinezumab dose, 74 were treated for ≥ 24 weeks and considered for effectiveness analysis. Eptinezumab significantly (p < 0.001) reduced MMD/MHD (− 10.5), MAI (− 15.6), NRS (− 2.2), HIT-6 (− 9.9), MIDAS (− 48.7), and MIBS-4 (− 4.3). ≥ 50% responders were 69%, ≥ 75% responders 39.2%, and 100% responders 4.1%. Comparing the first week with the last baseline week, a significant reduction in migraine days was observed (− 3.7; p < 0.001). Significant improvements were seen in patients failing anti-CGRP mAbs (32.4%) and in those escalating to 300 mg (33.8%). Half of the subjects reported being “very much improved” or “much improved”. The adverse events were infrequent (2.8%). Conclusions: This real-world study documents that 24-week eptinezumab treatment is rapidly effective and well tolerated in migraine patients with multiple therapeutic failures (including anti-CGRP mAbs). One-third of patients escalated to 300 mg at week 12, achieving further significant migraine-related disability reduction.