[The role of interferon beta in the treatment of multiple sclerosis].

Because of the demonstration for the first time of a measurable effect on magnetic resonance imaging, the publication in 1993 of the results of the American trial of interferon beta-1b in multiple sclerosis constituted a turning point in the history of multiple sclerosis (MS) treatment. Although many questions subsist concerning its optimal use, it has become a standard in the treatment of relapsing remitting MS to which new and old drugs will have to be compared. It seemed therefore meaningful to review the results obtained with recombinant interferon beta-1b and the more recently developed interferon beta-1a, and to place them in the context of the other immunomodulatory treatments currently offered in MS.