what inhalors have you been given? ones containing beclometasone(these come in 50, 100, 200 and 250 mcg) or salbutamol are for asthma, the steroids in this barely reach your bloodstream as they are inhaled directly into your lungs so have little chance of mixing with any other meds you take orally. copd is usually helped with tiotropium. but be careful, tiotropium is sometimes given for for long term severe asthma too but in this instance it is given alongside both beclometasone and salbutamol(salamol)
I am on the highest recommended dose of beclometasone (2000mcg) and take salamol as required(2-6 times a day) and because my asthma was still uncontrolable i now take 18mcg of tiotropium a day too! this has made it much more tolerable as i only have milder attacks and usually only a few times daily where before it was up to 10 times a day! i do not have copod, i have never even tried a cigarette, but do have severe asthma related to allergies!