for people ages 18-55 (full criteria)
at Irvine, California and other locations
study started
completion around



The purpose of each study is to independently measure the annualized relapse rate (ARR) with administration of frexalimab compared to a daily oral dose of teriflunomide in male and female participants with relapsing forms of multiple sclerosis (aged 18 to 55 years at the time of enrollment). People diagnosed with relapsing forms of multiple sclerosis are eligible for enrollment as long as they meet all the inclusion criteria and none of the exclusion criteria.

Study details include:

  • This event-driven study will have variable duration of approximately 40 months for the first participant being randomized and approximately 20 months for the last participant randomized.
  • The study intervention duration will vary ranging from approximately 20 to 40 months.
  • The assessment of scheduled visits will include 1 common end of study [EOS] visit and 3 follow-up visits) with a visit frequency of every 4 weeks for the first 6 months and then every 3 months.

Official Title

Master Protocol of Two Independent, Randomized, Double-blind, Phase 3 Studies Comparing Efficacy and Safety of Frexalimab (SAR441344) to Teriflunomide in Adult Participants With Relapsing Forms of Multiple Sclerosis


Multiple Sclerosis, Sclerosis, Teriflunomide, Cholestyramine Resin, Charcoal, Frexalimab, MRI contrast-enhancing agents, Cholestyramine, Activated charcoal


You can join if…

Open to people ages 18-55

  • The participant must have been diagnosed with RMS according to the 2017 revision of the McDonald diagnostic criteria.
  • The participant has an EDSS score ≤5.5 at the first visit (Screening Visit)
  • The participant must have at least 1 of the following prior to screening:
    • ≥1 documented relapse within the previous year OR
    • ≥2 documented relapses within the previous 2 years, OR
    • ≥1 documented Gd enhancing lesion on an MRI scan within the previous year.
  • Contraceptive use by men or women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.

You CAN'T join if...

  • The participant has been diagnosed with PPMS according to the 2017 revision of the McDonald diagnostic criteria
  • The participant has a history of infection or may be at risk for infection:
  • The presence of psychiatric disturbance or substance abuse.
  • History, clinical evidence, suspicion or significant risk for thromboembolic events, as well as myocardial infarction, stroke, and/or antiphosholipid syndrome and any participants requiring antithrombotic treatment.
  • History or current hypogammaglobulinemia.
  • A history or presence of disease that can mimic MS symptoms, such as, but not limited to neuromyelitis optica spectrum disorder, systemic lupus erythematosus, Sjogren's syndrome, acute disseminated encephalomyelitis, and myasthenia gravis.
  • The participant has had a relapse in the 30 days prior to randomization.
  • The participant has contraindication for MRI, ie, presence of pacemaker, metallic implants in high risk areas (ie, artificial heart valves, aneurysm/vessel clips), presence of metallic material (eg, shrapnel) in high risk areas, known history of allergy to any contrast medium, or history of claustrophobia that would prevent completion of all protocol scheduled MRI scans.

The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.


  • University of California, Irvine Site Number : 8401143 accepting new patients
    Irvine California 92697 United States
  • Regina Berkovich, MD, PhD Site Number : 8400005 accepting new patients
    West Hollywood California 90048 United States


accepting new patients
Start Date
Completion Date
Multiple Sclerosis Website
Phase 3 Multiple Sclerosis Research Study
Study Type
Expecting 1400 study participants
Last Updated