Ionis announced long-term data for Dawnzera for hereditary angioedema, or HAE, presented at the 2025 American College of Allergy, Asthma & Immunology, or ACAAI, Annual Scientific Meeting. Results demonstrate the long-term durability and safety of Dawnzera. At one year in the OASISplus open-label extension study, Dawnzera demonstrated a 94% overall mean HAE attack rate reduction. In a separate switch cohort, patients who switched to Dawnzera from lanadelumab, C1-esterase inhibity, or berotralstat experienced a 68% improvement in monthly HAE attack rate compared to their prior prophylactic therapy.
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