- Prior use of immunosuppressive treatments / disease-modifying drugs (DMDs) other than interferon-beta, glatiramer acetate, fingolimod, dimethylfumarate or teriflunomide within 12 months of the index episode. Shorter periods may be allowed at the discretion of the PI and after approval from the sponsor. Subjects may continue their current therapy with interferons, glatiramer acetate, fingolimod, or teriflunomide throughout the course of the study.