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Sanofi ends Phase 3 riliprubart trial after weak interim results

By Thomson Reuters Jun 10, 2026 | 1:38 AM

June 10 (Reuters) – Biopharmaceutical company Sanofi will stop a Phase 3 ​trial of its ‌drug riliprubart for a rare neurological condition after an interim analysis of the ‌study ​found it ⁠unlikely to provide ⁠sufficient efficacy.

In the MOBILIZE study, the drug was being tested for ​chronic inflammatory demyelinating polyneuropathy in patients ⁠whose condition resisted ⁠standard treatments.

• An ​independent data monitoring committee ​found no safety issues ‌related to the drug during the interim analysis

• Sanofi will evaluate ⁠the continuation of other ongoing riliprubart studies, including the Phase ⁠3 ‌VITALIZE trial

• ⁠The company said the ​termination ‌would not incur ​significant ⁠financial costs or change its 2026 financial guidance

(Reporting by Lucie Barbier in Gdansk, editing by Milla ​Nissi-Prussak)