It’s often harder to treat secondary progressive multiple sclerosis than relapsing-remitting multiple sclerosis.
The main type of drugs for multiple sclerosis (MS), called disease-modifying drugs (DMDs), make relapses happen less often and symptoms less severe. For people with secondary progressive multiple sclerosis (SPMS) who still have relapses, DMDs can still help. But for those whose symptoms just get gradually worse, the drugs don’t really work.