Overview
The purpose of this 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 who are 18 to 55 years of age at the time of enrollment.
Participants will either receive either frexalimab or teriflunomide for a duration depending on when they start their participation, up to approximately 40 months, potentially more. Frexalimab will be administered intravenously (IV; through an infusion line with a needle in the upper limb vein) every four weeks at the study site, or at the participant’s home under certain conditions. Teriflunomide will be administered orally once per day. Neither the participants nor their local study team will know which treatment they are assigned to while in the study. Participants will be randomly assigned to receive either IV frexalimab and an oral pill placebo OR oral teriflunomide and an IV placebo.
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