Hi all, I can't believe that this is my 45th Tysabri infusion which I take every 4 weeks - whoopi! I must say that it has been good in terms of reducing the amount of relapses that I have had. I remember being on Capaxone and I only lasted 2 months on it until it made my face look like a monster, my body hot like fire and I couldn't breathe properly. Anyway, back to Tysabri I have a major problem which has impacted even more on my day life and that is the serve headaches that I have been recieving. These headaches last for not only days but sometimes weeks. Is anyone else out there on Tysabri and experienced the similar problems?