i've dealt with copd issues with my grandmothers almost my whole life. the only things i can think of that your body would adversely be affected by are steroids and oxygen. if they put you on steroids for your lungs and you don't actually have copd that is not a good thing they put my grandmother on prednisone which is a steroid anyway steroids like this can become an issue for you especially if you don't need them because your body becomes dependent on it. oxygen is also something that your body will become dependent on. if they put you on a portable oxygen machine or if they had you put one in your home and you use it constantly your lungs will become dependent on that extra oxygen and after so long your body will not be able to go without it. this happened to both of my grandmothers and they both claimed that they felt better before they got on the oxygen than they did with it because they couldn't do anything with out it.
if you do not have copd but the er thinks you do and treat you accordingly can that adversly affect your breathing? . mom had an infarcted bowl took days for them to find it i told the er she had copd although she had no trouble breathing on her own except for one incident and was at that time diagnosed w/ copd. she never took oxygen or any breathing aids after the diagnosis but since she was diagnosed i told the er. when she died they put the 1st cause of death as breathing failure. septic shock infarcted bowl and heart failure i think were in there as 2nd and 3rd. .