The primary objective of the study is to determine whether a Medication Event Monitoring System (MEMS®) cap with a liquid crystal display (LCD) reader (a "smart" cap) along with additional patient counseling intervention (Arm 3) can improve adherence to dimethyl fumarate (DMF) treatment in Multiple Sclerosis (MS) patients as compared to a MEMS cap without an LCD reader (a "standard" cap) and no patient counseling intervention (standard of care, Arm 1) at Month 12.