If you have seen the Kesimpta commercials, you may have recognized the actress who stars in one of them. Kesimpta is the brand name of Ofatumamab, which is a prescription medicine used to treat adult patients who are experiencing relapsing forms of multiple sclerosis (MS), such as clinically isolated syndrome (CIS), and other secondary diseases (via Kesimpta). MS is an autoimmune disease that results in damage to the brain and spinal cord, and can result in numbness, weakness, difficulty walking, vision changes, and more (via MayoClinic).