AstraZeneca's anti-IL-33 antibody tozorakimab met its primary endpoint in the Phase 3 Oberon and Titania trials, significantly reducing the annualized rate of moderate-to-severe COPD exacerbations compared to placebo. 1 3 Success was observed in a broader-than-expected population, including former and current smokers across all blood eosinophil counts and lung function severity stages. 1 2 3 Tozorakimab demonstrated a favorable safety profile and was generally well-tolerated. 1 3 Unlike competitors like Sanofi/Regeneron's itepekimab and Roche's astegolimab, which had mixed results, tozorakimab showed consistent efficacy across trials. 1 3 Topline results announced on March 27, 2026; full data to be presented at an upcoming medical meeting. 1 3 AstraZeneca is conducting additional Phase 3 trials (Prospero and Miranda) in COPD, with results expected in the first half of 2026. 1 3 Analysts highlight tozorakimab's potential for peak sales of $3-5 billion and bro...
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