Low-dose(1.5mg-4.5mg) naltrexone may help this and other autoimmune diseases https://www.lowdosenaltrexone.org/ . It’s been known since 1985, but the FDA can’t seem to get around to testing it.
Ivermectin also treats MS.
https://www.ajmc.com/view/study-identifies-ivm-as-potential-candidate-to-promote-remyelination-for-ms