# First Tysabri infusion and fatigue

**URL:** <https://forum.mssociety.org.uk/t/first-tysabri-infusion-and-fatigue/12567>\
**Category:** Everyday living\
**Created:** [3 May 2018 08:59 UTC](https://forum.mssociety.org.uk/t/first-tysabri-infusion-and-fatigue/12567 "2018-05-03T08:59:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Xtelle003](https://avatars.discourse-cdn.com/v4/letter/x/9de053/32.png) [@Xtelle003](https://forum.mssociety.org.uk/u/Xtelle003)\
**Post date:** [3 May 2018 08:59 UTC](https://forum.mssociety.org.uk/t/first-tysabri-infusion-and-fatigue/12567/1 "2018-05-03T08:59:11Z")

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Hello, I have started Tysabri on Friday last week after being on Copaxone for 5 months. I did not really feel any different after that until yesterday at work when I suddenly got really tired. It was so bad that I slept on the floor for more than an hour ☹ and was sent home.

I have expecting to feel the side effects on the day or at least the day after but it happened 5 days post Tysabri. Is did normal or it has nothing to do with the infusion?

Christelle