The purpose of this study is to define a safe optimal dose or SAR442168, a small molecule,oral, once daily, CNS-penetrating, irreversible covalent inhibitor of BTK in participants with relapsing multiple sclerosis.
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Study Coordinators and Research Nurses cannot give medical advice over the phone. Telephone numbers and email addresses are provided for obtaining additional information on specific research studies only. If you have specific questions which require clinical expertise, please call your primary care physician.