An Open-label, Single-arm Study to Evaluate Pharmacokinetics, Pharmacodynamic Effects, Safety and Tolerability of Fenebrutinib in Children and Adolescents With Relapsing Multiple Sclerosis
This open label, single arm study will evaluate the PK and PD effects of fenebrutinib in children and adolescents with RMS aged between 10 and \< 18 years. This study consists of a Dose Exploration Period and an Optional Extension Period. Eligible participants may choose to continue treatment with fenebrutinib in the optional extension period after completing the dose exploration period.
• A diagnosis of RMS in accordance with the International Pediatric Multiple Sclerosis Study Group (IPMSSG) criteria for pediatric MS, Version 2012, and the revised 2017 McDonald Criteria and one or more of the following: at least one MS relapse during the previous year or two MS relapses in the previous 2 years or evidence of at least one Gd enhancing lesion on MRI within 6 month
• Expanded Disability Status Scale (EDSS) at screening from 0 to 5.5 points, inclusive
• Children and adolescents must have received all childhood vaccinations as per local/national recommendations for childhood vaccination against infectious diseases