multiple sclerosis
"I took Tysabri for about 4 1/2 years and had no problem.  My biggest complaint was that it made my hair thin and fall out.  But, my feelings have completely changed.  The reason I originally went off of Tysabri was to try to have a baby.  Now that I know what I know, I would have stopped using Tysabri as soon as possible.  I am 35 years old and have to have a total hip replacement because of taking Tysabri.  A side effect of Tysabri is Avascular necrosis, which killed the top of my femor bone.  So, now I have to have a total hip replacement. This is absolutely horrible for me because I am such an active person who loves working out.  I will have a hard time going back on any drug after this."