Hi Cindy, I had the same problem as when I took my 1st PFT test there was very little coughing. The 2nd test I was like you and coughed with every breath.On the 3rd test after getting info from this forum I asked my Dr for a prescription for Prednisone. He sent in a prescription for 40 mg to be taken 5 days before my test and it went well. They were able to compare with the first test.And funny you should bring this up, I am going for another PFT next Monday and today was the first dose of prednisone, so hopefully it will go good again. Good luck with your next test
JAMPFF