Trial is the first to show a delay in confirmed disability progression in non-relapsing secondary progressive MS

A Cleveland Clinic-led clinical trial of tolebrutinib, an investigational oral Bruton’s tyrosine kinase inhibitor, a group of drugs originally developed to treat lymphomas and related blood disorders, demonstrated a 31% delay in the onset of six-month confirmed disability progression (CDP) in patients with non-relapsing secondary progressive multiple sclerosis (SPMS).