keywords: fda tysabri pharmaceuticals antegren idec
text: Thoughts on Tysabri #39;s Approval For those that missed it last night, Biogen Idec (BIIB:Nasdaq - news - research) and Elan Pharmaceuticals (ELN:NYSE ADR - news - research) received FDA approval for their new multiple sclerosis drug, now called Tysabri (formerly known as Antegren.