This study uses a prospective, single arm, open-label, multi-center treatment design, enrolling subjects who are transitioning from DMF or fingolimod.
The purpose of the study is to complement the ofatumumab pivotal Phase 3 program by exploring outcomes of patients transitioning from commonly used oral therapies, dimethyl fumarate (DMF) or fingolimod, to ofatumumab due to breakthrough disease (defined as relapse, Gd+, or new/enlarging T2 lesions)
| 
   Medication  | 
  
   Exclusionary if used within the timeframe specified below  | 
 
| 
   Systemic corticosteroids, adrenocorticotropic hormone  | 
  
   30 days prior to screening MRI scan  | 
 
| 
   ·        
  Highly immunosuppressive/chemotherapeutic medications (mitoxantrone,
  cyclophosphamide, cladribine) ·        
  B-cell
  targeted therapies (e.g. rituximab, ocrelizumab) ·        
  Laquinimod  | 
  
   2 years prior to first study drug
  administration  | 
 
| 
   ·        
  Mitoxantrone
  (with evidence of cardiotoxicity following treatment or cumulative life-time
  dose >60mg/m2) ·        
  Alemtuzumab ·        
  Lymphoid
  irradiation; bone marrow transplantation ·        
  Other
  strongly immunosuppressive treatments (with effects potentially lasting over
  6 months) ·        
  Ofatumumab ·        
  aCD20+
  monoclonal antibodies in development (e.g. ublituximab or obinutuzumab)  | 
  
   Any time  |