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Fitusiran Delay Dents Sanofi’s Hemophilia Challenge

Company Still Aiming For Universal Therapy

 
• By Andrew McConaghie

New data show fitusiran’s promise across hemophilia A and B, but a switch to a lower dose prompted by safety concerns will delay its filing until 2024.

Sanofi Lyon
A move to target hard-to-treat blood disorders is part of Sanofi's strategy, but has been hit by numerous trial delays. • Source: Alamy

Sanofi retains hopes that fitusiran can play a significant role across all hemophilia patients following the presentation of the Phase III ATLAS studies at the American Society of Hematology (ASH) congress, but it still has much to prove against Roche’s hemophilia A blockbuster, Hemlibra, and late-stage hemophilia B gene therapies.

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