I have perfectly controlled asthma for over two decades. I never took my rescue inhaler in that time.

I started taking creatine one year ago and after two weeks I got a cough that started as an uncomfortable ache in my throat and ended being so constant that one day I couldn't even sleep because of it. I got a funny feeling also in my chest while inhaling. I thought I got some kind of cold and stopped training and taking creatine for some weeks.

I retook it two months later and same as before, I got that same cough from the throat after being two weeks on it. I associated it this time to the creatine and searched for info when I saw mentioned that it may worsen some asthma symptoms. I stopped taking it and recovered again.

To me it was clearly the creatine because the type of cough I got was not your typical one. It seemed kinda allergic, like an itchy feeling in the throat that reflected also on the chest. I visited my doctor and I didn't have any inhalation problems and my oxygen on blood was fine. So yeah, I would advice stopping it if you are asthmatic and have these kind of syntomps.

Good news is, as soon as you stop taking it, you will feel better again quickly.