EU approves Acadia's trofinetide for Rett syndrome treatment
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European Commission Approves DAYBU® (trofinetide) as the First and Only Treatment for Neurobehavioral Symptoms of Rett Syndrome in the European Union
August 24, 2026 3:01 AM EDTSAN DIEGO--(BUSINESS WIRE)-- Acadia Pharmaceuticals Inc. (Nasdaq: ACAD) today announced that the European Commission (EC) has granted marketing authorization for DAYBU (trofinetide) for the treatment of neurobehavioral symptoms of Rett syndrome in adults and pediatric patients aged five years and older, making it the first and only treatment approved for Rett syndrome in the European Union (EU).
The approval of DAYBU marks a significant milestone for the Rett syndrome community in the EU and advances our mission to bring this innovative treatment to patients and families who have long faced a... More

