AstraZeneca's Tozorakimab Cuts COPD Exacerbations in Phase III Trials

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AstraZeneca announced that full results from the Phase III OBERON and TITANIA trials show tozorakimab is the first biologic to achieve statistically significant and highly clinically meaningful reductions in moderate and severe COPD exacerbations across a broad patient population, including former and current smokers and all blood eosinophil counts. Compared with placebo, tozorakimab 300mg every four weeks reduced exacerbations by 29% in former smokers in OBERON and 34% in TITANIA, and by 30% and 29% respectively in the overall population. A pooled analysis found reductions of 23% in patients with baseline eosinophils below 150, 34% in those at or above 150, and 43% in those at or above 300. The results were published in the New England Journal of Medicine and presented at the European Respiratory Society Congress 2026, and the US FDA has accepted the Biologics License Application for Priority Review with a PDUFA date anticipated in the first quarter of 2027.

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Phase III data shows tozorakimab significantly reduces COPD exacerbations, with FDA Priority Review accepted.

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