All I can tell you is that breathing is worth way more than singing. I sing as well but also suffer with asthma. Have you ever tried using a nebulizer?

I am also an asthmatic ever since and was given inhaled steroids for it. i have tried to switch from seritide to symbicort and have experienced the same vocal deterioration. i tried discontinuing the use of steroids and now solely dependent on salbutamol inhaler. well, i guess my singing voice improved a little than when i was in steroids, but i have more attacks. you really need choose..

Steroid based anti-inflammatory inhalers will all do this.
I believe that Advair has been pushed so heavily by the pharm company that we have all become brainwashed into thinking that every asthmatic needs it. I am a die hard nay sayer and said no to Advair. I did not want the down played risk of osteo- porosis. I use a regular Albuterol inhaler twice a day every day and have not needed urgent medical treatment.I take Singulaire and that really helps me. There is also a drug called Cromolyn Sodium. It was used a lot in the eighties and it really helped my son.I beleive it is still on the market but you have to ask for it from your MD.Good old fashioned weight loss and walking regularly also help!! It seems that Advair has taken over the universe.Some people should be on an a steroid based inhaler but other options may be able to help. Good luck.

I've suffered asthma and allergies all my life...and been singing since young... I found same problem and my voice was ceasing up completely and making it impossible for me to talk let alone sing... changed about 10 months ago to new medication Alvesco 160mcg (can get a 80mcg dose also - ingredient ciclesonide)still has steriods but doesn't seem to affect my voice like the others did and I can sing and talk again!! Maybe it can help you..??