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

Summary

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 depending on the recruitment rate, the event rate, the study discontinuation rate and the 12-month minimum treatment duration. Different participants will have different study durations. The last participant randomized will have at least 12 months of study duration, and assuming a 28-month recruitment period, the first participant randomized will have 40 months or longer of study duration. * The study intervention duration will vary similarly as the study duration. * 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.

Eligibility

Age range

18–55 years

Sex

All

Healthy volunteers

No

Interventions

• Drug
  Frexalimab

  SAR441344 Solution for IV infusion

• Drug
  Teriflunomide

  Aubagio oral tablet

• Drug
  Placebo infusion

  Solution for IV infusion

• Drug
  Placebo tablet

  Oral tablet

• Drug
  MRI contrast-enhancing agents

  IV, as per respective label

• Drug
  Cholestyramine

  oral, 8 g 3 times daily for 11 days for accelerated elimination procedure (4 g 3 times daily for 11 days in case of intolerance). The teriflunomide local label should be followed.

• Drug
  Activated charcoal

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