Hello I am new here and was in a work related accident a few weeks ago. I was doing maintenance inside a holding tank wearing an air supplied hood and suffered what I thought (as well as my primary doctor) severe heat exhaustion. Couldn't catch my breath for about an hour after coming out. Went to see a Pulmonologist 2 weeks ago and he did a CT scan and 6 min walking test. I was told there was "no immediate life threatening situations regarding my lungs" like an embolism. So my question is why would he prescribe BREZTRI Aerosphere inhaler to be taken twice a day for 3 weeks before any kind of breathing tests? Isn't that used primarily for COPD? By the way this med is making me feel bad. Thank you for any input.