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Takeda Announces Positive Results from Two Pivotal Phase 3 Studies of Oveporexton (TAK-861) in Narcolepsy Type 1

Business Wire India Monday, 14 July 2025 ()
*Business Wire India*– Both Phase 3 Studies Met all Primary and Secondary Endpoints Demonstrating Statistically Significant Improvements Across Symptoms at All Doses, Building Upon Phase 2b Results   – Oveporexton was Generally Well-Tolerated in Phase 3 Safety Profile   – Takeda is Rapidly Advancing Regulatory Submissions and Launch Preparedness with the Aim to Bring Oveporexton to People Living with Narcolepsy Type 1 as Quickly as Possible   – These Results Mark a Major Advancement Toward Transforming the Standard of Care by Addressing the Underlying Cause of Narcolepsy Type 1   Takeda (TSE:4502/NYSE:TAK) today announced that all primary and secondary endpoints were met in two Phase 3 randomized, double-blind, placebo-controlled studies of oveporexton (TAK-861), a potential first-in-class investigational oral orexin receptor 2 (OX2R)-selective agonist, in narcolepsy type 1 (NT1). NT1 is caused by the loss of orexin-producing neurons in the brain. Orexin agonists are designed to address this underlying orexin deficiency. For the first time, this mechanism of action has been validated in Phase 3 studies demonstrating significant improvement across a broad range of symptoms. These results reinforce the potential of oveporexton to transform the standard of care.   “We are thrilled to reach this pivotal milestone for the oveporexton program. Oveporexton is a testament to Takeda’s strength in discovering and developing a potential new class of medicines for difficult to treat diseases such as narcolepsy type 1,” said Christophe Weber, president and chief executive officer at Takeda. "Our leadership in orexin biology and building a multi-asset orexin franchise with transformative potential will position Takeda for long-term future growth.”     The FirstLight (TAK-861-3001) and RadiantLight (TAK-861-3002) studies were two large, global Phase 3 studies conducted in 19 countries. Both studies achieved statistically significant improvement compared to placebo with p-values of
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