Short periods of use may be ok. No long term data supporting CS in the long tissue, or the way it is removed from tissue.
I personally use when having asthma like symptoms with Bronchitis. It works to me, better than the breathing treatments Meds (albuteral).
That being said, I don't have a condition that I need inhalers everyday or more. I do ingests CS daily Morn and Night equal to one tspn each dose. So far I am seeing so many small irritating issues resolved, you couldn't get me to stop taking.
I also reference the Facebook Steve Bradwicks Colloidal Silver Secret Community. This site has a world of information. To help you figure out what is best for you.