With FDA's OK, Genentech drug becomes first for severe MS cases The FDA has approved a new Genentech multiple sclerosis drug, Ocrevus, the first marketed therapy for the most severe form of the disease. MS comes in different forms characterized by the severity and progression of the disease. While many drugs are available to treat MS, none have worked on people with the “primary progressive” form of the disease, which can lead to arapid declinein patients’ ability to walk, speak, and function.(Xconomy)