Had a bit of an experience this morning.
I'm participating in a study which also involves doing a pulmonary function test that could be done in my home. (They know already that I have asthma.) When I made four different attempts with the spirometer, I kept getting "D" and "F" levels which are NOT good at all. (It's possible that my asthma was getting ready to kick up but I had not started experiencing symptoms yet.) After the fourth attempt, I started feeling "wheezy" and informed the people involved with this clinical study that I will need to pause the test and get my inhaler. (At first, I think I scared them but I told them I would be fine since I was nipping the symptoms in the bud, so to speak.)
After we waited until the medication was in my system, we started a new round of the pulmonary function test with the notation about the medication and I started achieving PERFECT scores! (Definitely documented that my symptoms were NOT part of my being "crazy" as the NBitch often decreed that they were!)