I think I've mentioned this before, but I have asthma. Not exercise induced asthma, but regular, full-time asthma that requires daily medication to keep things in check.
A couple years ago, I sat down with my doctor to go through my medication and fill out my TUE forms to make sure everything was on the up and up. On the form, it required doctors to certify that there were no other non-banned medications to control my asthma. Doctor pointed out there were several options that were not banned that I could use.
We changed my medications to those options to see if they would work. Turns out they did.