CAMBRIDGE, Mass.--(BUSINESS WIRE)--Biogen Idec (NASDAQ: BIIB) and Elan Corporation, plc (NYSE: ELN) today announced enrollment of the first patient in a global Phase IIIb, randomized, rater-blinded, active-controlled study designed to evaluate switching to TYSABRI® (natalizumab) from Copaxone® (glatiramer acetate) or Rebif® (interferon beta-1a) in patients with relapsing remitting multiple sclerosis (RRMS). The study, called SURPASS, is expected to enroll 1,800 patients in 27 countries and provide direct comparative data of different treatment options for RRMS patients who experience breakthrough disease activity.
