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SAR441344

Phase 2

Multiple Sclerosis | Small molecule | Immunology |Sanofi|Last Updated: Sep 30, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment129
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04879628Proof-of-concept Study for SAR441344 (Frexalimab) in Relapsing Multiple SclerosisPHASE2 ACTIVE NOT_RECRUITING 129Jun 7, 2021Aug 23, 2027Sep 30, 202537 United States, Bulgaria +8
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Study Endpoints
Primary Endpoints
Mean Number of New Gadolinium (Gd)-Enhancing T1--Hyperintense (GdE T1) Lesions at Week 12 Relative to Week 8 as Measured by Brain Magnetic Resonance Imaging (MRI)
Week 8 and Week 12

Cranial (brain) MRI was performed to identify number of new GdE T1-hyperintense lesions at Week 12 relative to Week 8 MRI. Central review was used to identify new GdE T1 lesions not present at the previous MRI scans.

Secondary Endpoints
Mean Number of New or Enlarging T2 Lesions at Week 12 Relative to Week 8
Week 8 and Week 12
Mean Total Number of GdE T1 Lesions at Week 12
Baseline (Day 1) and Week 12
Double-Blind Period: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events (TESAEs)
From first dose of study drug (Day 1) up to 12 weeks (DB TE period)
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Intravenous (IV) SAR441344EXPERIMENTALSAR441344 IV
IV PlaceboPLACEBO_COMPARATORPlacebo IV
Subcutaneous (SC) SAR441344EXPERIMENTALSAR441344 SC
SC PlaceboPLACEBO_COMPARATORPlacebo SC
Interventions
NameTypeDescription
SAR441344 IVDRUGPharmaceutical form: Solution Route of administration: IV infusion
placebo IVDRUGPharmaceutical form: Solution Route of administration: IV infusion
SAR441344 SCDRUGPharmaceutical form: Solution Route of administration: SC injection
placebo SCDRUGPharmaceutical form: Solution Route of administration: SC injection
MRI contrast-enhancing preparationsDRUGgadolinium compound, including but not limited to Magnevist, Multihance, Prohance, or Elucirem
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Eligibility Criteria
Age Range18 Years — 55 Years
SexALL
Healthy VolunteersNo
Study Sites37

Inclusion criteria: * Participant must be 18 to 55 years of age inclusive, at the time of signing the informed consent. * The participant must have been diagnosed with RMS (relapsing-remitting MS and secondary progressive MS participants with relapses) according to the 2017 revision of the McDonald...

Countries:United StatesBulgariaCanadaCzechiaFranceGermanyRussiaSpainTurkey (Türkiye)Ukraine
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT04879628primaryCompletionDate: changed
LOWMay 24, 2026NCT04879628studyFirstPostDate: changed