How is TYSABRI different?
TYSABRI is an antibody, not an interferon (AVONEX®(interferon beta-1a), Betaseron® (interferon beta-1b), Extavia® (interferon beta-1b), Rebif® (interferon beta-1a))* or glatiramer acetate (Copaxone®).* TYSABRI is thought to inhibit white blood cells from getting into the brain and attacking nerves. Keeping these cells from attacking nerves is believed to result in fewer brain lesions** that cause multiple sclerosis symptoms. **Changes in MRI often do not relate to how your MS is progressing. It is important to note that while the way in which TYSABRI works has been studied, the exact way that TYSABRI works is not fully known. TYSABRI is infused into a vein once every 4 weeks, so you don’t need to self inject. *AVONEX is a registered trademark of Biogen Idec. All other trademarks are the property of their respective owners.
