several new medications are being investigated in late phase studies for the treatment of patients with relapsing or progressive multiple sclerosis ms these agents represent a variety of mechanisms of action and provide not only lower relapse rates but also improvement in disabilities the majority of investigational trials involve selective sphingosine 1 phosphate receptor 1 immunomodulators such as laquinimod ozanimod ponesimod and siponimod in an effort to build on the success of fingolimod ocrelizumab is a cd20 positive b cell targeting monoclonal antibody with a promising new mechanism of action ofatumumab is also a cd20 inhibitor daclizumab an interleukin 2 inhibitor has evidence of good efficacy but is associated with unfavorable side effects masitinib is a mast cell inhibitor that also has shown efficacy in alzheimer s disease and amyotrophic lateral sclerosis phase 3 trials for some of these agents will conclude in the next 12 months and their manufacturers are expected to apply for us food and drug administration approval soon thereafter this review article summarizes data for newly approved and late phase investigational agents for the treatment of patients with ms.