Safety, tolerability, and efficacy of atogepant added to onabotulinumtoxinA for the preventive treatment of chronic migraine: A phase 3, multicenter, 24-week, open-label study
Abstract
BackgroundTreatment with onabotulinumtoxinA is effective in reducing migraine day frequency and duration in individuals with chronic migraine (CM), but given the severity of the disease, those with CM often need additional treatment to achieve optimal outcomes. Combining preventive treatments with distinctly different physiological targets may yield greater benefit than monotherapy. This study evaluated the safety, tolerability, and efficacy of adding atogepant to onabotulinumtoxinA for preventive treatment of CM.MethodsIn this 24-week, Phase 3, open-label, single arm, multicenter study (NCT05216263), 75 participants on a stable dose of onabotulinumtoxinA (155-200U) with baseline mean monthly migraine days (MMDs) of 8-23 (inclusive) received add-on atogepant 60 mg once daily. Primary safety endpoints included treatment-emergent adverse events (TEAEs), and exploratory efficacy endpoints included changes in MMDs, changes in mean monthly headache days (MHDs) and responder rates (RRs) (≥50%, ≥75%, and 100% MMDs) over Weeks 1-12, Weeks 13-24, and at each 4-week interval.ResultsThe mean age of study participants was 48 (13.68) years (mean (SD)); 89% were women, and 97% were white. Participants had an established CM diagnosis for 15 (13.27) years (mean (SD)) and had been treated with onabotulinumtoxinA for 4 (3.45) years (mean (SD)). In the safety population (n = 75), the incidence of TEAEs was 65.3%. TEAEs occurring in ≥5% of participants were constipation (n = 12, 16.0%), nausea…
How strong is the evidence?
Evidence Hub reads this as a clinical trial, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence. Reported size: 75 participants or records.
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