Ofatumumab: A Review in Relapsing Forms of Multiple Sclerosis.

Ofatumumab (Kesimpta®) is a fully human anti-CD20 monoclonal antibody that can be self-administered by patients and is approved in several countries worldwide for the treatment of relapsing forms of multiple sclerosis (MS). In two identical phase III trials in adults with relapsing forms of MS, subcutaneous ofatumumab was more effective than oral teriflunomide in reducing the annualized relapse rate, as well as reducing MRI-detected lesion activity and limiting worsening of disability. Ofatumumab had a generally manageable tolerability profile; the most common adverse events (AEs) included nasopharyngitis, headache, upper respiratory tract infections and urinary tract infections. AEs of special interest (AESIs) included infections and injection-related reactions, which were generally manageable. There was no apparent association between changes in immunoglobulin G or M levels and the risk of serious infections after 3.5 years of ofatumumab treatment. Thus, ofatumumab is a convenient treatment option that is effective and has a generally manageable tolerability profile in adults with relapsing forms of MS.