Phase 3 Trial Comparing Oral Orelabrutinib to Placebo for Adults with Primary Progressive Multiple Sclerosis Aged 18 to 60

What this Trial Is About

Researchers are evaluating orelabrutinib, a brain-penetrating BTK inhibitor, in adults with Primary Progressive Multiple Sclerosis PPMS. This phase 3, randomized, double-blind, parallel-group, multicenter study compares orelabrutinib to placebo to assess its efficacy and safety in treating PPMS. About 705 participants aged 18 to 60 years will be enrolled globally with a 21 randomization favoring orelabrutinib. Participants will receive either oral orelabrutinib or a matching placebo. Treatment will last approximately 30 to 60 months, with a minimum of 12 months on study drug. The study includes two groups one receiving orelabrutinib and the other receiving placebo, both administered orally. The trial design is intended to monitor long-term effects and progression. During the study, participants will undergo regular assessments including disability progression measured over 12 weeks and up to approximately 120 weeks. Evaluations include MRI scans to monitor lesions, timed walking and hand function tests, cognitive testing, and safety assessments such as monitoring adverse events. The study will closely follow participants for up to 5 years to understand the impact of the treatment on disease progression and safety.

A Study of Orelabrutinib in Patients With Primary Progressive Multiple Sclerosis