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GSK wins US approval for twice-yearly asthma drug

Exdensur cuts severe eosinophilic asthma exacerbations by up to 58% with twice-yearly dosing, offering a less frequent treatment option for patients aged 12 and older.

  • On Tuesday, the U.S. Food and Drug Administration approved Exdensur as an add-on maintenance treatment for severe asthma characterised by an eosinophilic phenotype in patients aged 12 years and older, with GSK plc commercializing the product.
  • Following the EMA committee's positive opinion, the UK's MHRA cleared Exdensur for asthma and CRSwNP, while the FDA approved only severe asthma, creating regulatory divergence.
  • SWIFT-1 and SWIFT-2 phase 3 trials show depemokimab reduced annualized exacerbation rates by 58% and 48% and led to fewer hospital and emergency room exacerbations versus placebo control.
  • With a planned U.S. launch in early 2026, GSK expects to enter a competitive biologics market and predicts peak sales of $4 billion and $3.7 billion across indications.
  • The drug's twice-yearly schedule, enabled by Exdensur’s ultra-long-acting IL‑5 antibody, may increase willingness among about 2 million Americans with severe asthma, 80% having eosinophilic phenotype.
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Reuters broke the news in United Kingdom on Tuesday, December 16, 2025.
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