Ionis announces positive topline results from Phase 3 OASIS-HAE study of investigational donidalorsen in patients with hereditary angioedema

• Donidalorsen met the primary endpoint with a statistically significant reduction in the rate of HAE attacks in patients treated every 4 weeks or patients treated every 8 weeks 
• Donidalorsen demonstrated a favorable safety and tolerability profile
• Ionis is preparing to submit a New Drug Application with U.S. FDA
• Data to be presented at an upcoming medical congress

CARLSBAD, Calif., Jan. 22, 2024 /PRNewswire/ -- Ionis Pharmaceuticals, Inc. (Nasdaq: IONS) today announced positive topline results for the Phase 3 OASIS-HAE study of donidalorsen in people with hereditary angioedema (HAE). The trial met its primary endpoint of reduction in rate of angioedema attacks in patients treated with donidalorsen (80mg) via subcutaneous injection dosed every 4 weeks (Q4W) (p