ABSTRACT
In the previous two decades several immunomodulatory and immunosuppressive therapies
have been shown to favorably impact the inflammatory activity and course of multiple
sclerosis. There are now six approved therapies for the disease. Clinical decision-making
has become more complex because of the increasing number of available drugs, the lack
of head-to-head comparisons that allow direct comparisons of efficacy, and special
factors that may influence efficacy such as neutralizing antibodies against β-interferon
preparations. Furthermore, all current therapies are partially effective; therefore,
most patients experience breakthrough disease activity while using them, and there
are no validated treatment failure definitions or management algorithms. This review
outlines current evidence supporting efficacy of available drugs and scenarios for
which more studies are required, and highlights the need for emerging therapies and
strategies for multiple sclerosis management, including investigative oral and parenteral
agents and combination therapy approaches.
KEYWORDS
Multiple sclerosis - drug therapy - β-interferon - glatiramer acetate - natalizumab
- mitoxantrone - immunosuppression
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Dean M WingerchukM.D. M.Sc. F.R.C.P.(C.)
Department of Neurology, Mayo Clinic College of Medicine
13400 East Shea Boulevard, Scottsdale, AZ 85259
Email: wingerchuk.dean@mayo.edu