FDA Grants Priority Review to Insmed's ARIKAYCE sNDA for MAC Lung Disease Based on Phase 3b ENCORE; PDUFA Date January 28, 2027
Insmed announced on Monday, September 21, 2026 that the FDA granted Priority Review to its supplemental New Drug Application for ARIKAYCE (amikacin liposome inhalation suspension) to treat Mycobacterium avium complex (MAC) lung disease as part of a combination antibacterial regimen, with a PDUFA target action date of January 28, 2027. The filing rests on the Phase 3b ENCORE study, which enrolled 425 patients, 82.4% of them with a first MAC infection, and met its primary endpoint and its multiplicity-controlled secondary culture-conversion endpoints. ARIKAYCE's PULMOVANCE liposomal technology delivers amikacin to lung macrophages while limiting systemic exposure. The drug received FDA accelerated approval in 2018 for refractory MAC lung disease and was the first product approved under the Limited Population Pathway for Antibacterial and Antifungal Drugs.