I've only been on it a month and have terrible headaches lasting 3 days sometimes throughout the week. My legs are weak and I feel terrible. I'll give it another month and if I still feel this way, I'm off it.

i've been on avonex treatment for almost 5 years and still have headache and muscle pain. it last 1 day. I don't understand that after so long the side effects are still there. I don't know if someone change for another treatment than avonex and find it better ?

thank you

for 4.5 years. the first year was hard but then a new doctor changed me to the powder form I mixed myself and the side effects went down considerabley. You also have to hydrate really well during the day before you take the shot and after as the Avonex causes dehydration. Systoms of dehydration are fatique, headache, nasea and joint pain. As long as I drink plent of fluids I do well. My doctor did say the prefilled syringes are less tolerated so if you are using that form i recommend changing. It did me a world of wonder