The purpose of the study is to assess the efficacy and safety of SAR442168 compared with teriflunomide (Aubagio) in participants with relapsing multiple sclerosis (RMS).
The experimental drug works in the blood and in the brain where it blocks a molecule called “Bruton's tyrosine kinase (BTK)”, which is present in some cells involved in multiple sclerosis (immune cells known as B-cells and microglial cells). This mechanism of action may help stop the formation of new brain lesions in MS.