BIIB/ELN started an RRMS “switching” study of Tysabri vs Copaxone or Rebif. (See #msg-46709942 and #msg-39971611 for background on where these drugs stand commercially.)
Updated for Tysbari 1Q10 sales as reported yesterday by BIIB:
In the first quarter global sales of Tysabri rose 28 percent to $292 million. As of the end of March, about 50,300 patients were on commercial and clinical Tysabri therapy worldwide. That compares with a figure of 48,800 patients as of the end of 2009.