Ionis Pharmaceuticals, Inc.  announced that it will present additional data from the pivotal Phase 3 OASIS and OASISplus studies, as well as three year data from the Phase 2 open-label extension (OLE) study of donidalorsen, the company’s investigational RNA-targeted prophylactic medicine for hereditary angioedema (HAE). Results will be presented at the 2025 American Academy of Allergy, Asthma & Immunology (AAAAI) / World Allergy Organization (WAO) Joint Congress in San Diego, California.

The New Drug Application (NDA) for donidalorsen to prevent attacks of HAE in adult and pediatric patients 12 years of age and older is currently under review with the U.S. Food and Drug Administration (FDA), with a target action date of August 21, 2025.

“While there’s been notable advancement in the HAE treatment landscape, there is still an urgent need for a medicine that effectively reduces attacks, is well tolerated and simple to administer. Across the breadth of presentations at the congress, we believe the totality of the clinical evidence underscores the potential of donidalorsen to be the prophylactic treatment of choice for people living with HAE,” said Kenneth Newman, M.D., senior vice president, head of clinical development, Ionis. “In new analyses from our OASISplus prospective switch cohort, donidalorsen continued to demonstrate the ability to reduce the HAE attack rate burden and improve quality of life in patients previously on other prophylactic treatments, with the simplicity of monthly or every two-month self-administration via an autoinjector. As a first-in-class RNA-targeted medicine, we believe donidalorsen has the potential to advance the prophylactic treatment paradigm for HAE.”