Yesterday I had my first dose of kesimpta I was so worried and scared for weeks about starting it as I had anxiety about the side affects and feeling like a bag of poo for days! But I will be totally honest I didn't have any side affects! No hot and cold flashes no headache or anything! I only feel a little bit more tired than normal but I do have a 3 year old daughter who doesn't like to sleep haha! Has anyone else who had there first treatment not have any reaction to it!