Prednisone
"I've just been given this for my asthma as I'm struggling to breathe. So far my nose and head hurts and don't feel like it is working. I'm only on my 2nd dose and every review so far I've read says it works within a few hours. I can't tell if I'm having a reaction to it or not.. but it definitely isn't working. I can't walk from my room to my bathroom without keeling over and not being able to breathe."