Efficacy and Safety Studies of Frexalimab (SAR441344) in Adults With Relapsing Forms of Multiple Sclerosis

Study 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.

Primary Outcome

ARR during the study period assessed by protocol-defined adjudicated relapses. This endpoint will be analyzed in the ITT population of each study using a negative binomial model with the total number of adjudicated relapses per participant occurring during the observation period as the response variable and with terms for treatment group, Gd-enhancing T1 lesions at baseline (presence, absence), EDSS strata (\<4, ≥4), and geographical region (US, non-US).

Conditions Studied

Interventions

• DRUG Frexalimab
• DRUG Teriflunomide
• DRUG Placebo infusion
• DRUG Placebo tablet
• DRUG MRI contrast-enhancing agents

Study Locations (20)