Roche announced that the U.S. Food and Drug Administration (FDA) has granted Breakthrough Therapy Designation for the investigational medicine ocrelizumab (OCREVUSTM) for the treatment of people with primary progressive multiple sclerosis (PPMS). There are currently no approved treatments for PPMS, a debilitating form of MS characterised by steadily worsening symptoms and typically without distinct relapses or periods of remission.