I am not sure if this is the case with you, but, I have heard that adult onset asthma is often parasites that build in your entire body. I'm not a dr, but I believe in using homeopathic remedies as well as medical, I also had asthma for much of my life and I hate the inhalers, they burn. I know God gave people the gift of healing in the medical field as well as natural healers. You should check with your doctor first, but I got a colon cleanse at Dr.Natura.com, there are hundreds of testimonials. We got drastic results from the product, from weight loss, to psoriasis clearing up, my allergies didn't bother me for the whole first month. I have stopped doing the cleanse because I'm very forgetful and I regret stopping the program. It was really helping all of us who were doing it. It gave us energy, healthy BM's, less bloating after meals, help with my allergies.....the list goes on.
Again, I'm not a doctor and you should consult your doctor, but I believe in this product. Our whole family has used it.
P.S. When my allergies are bothering me, I get a stuffy nose and headaches real bad, I use a saline rinse. The one I use is called AYR, it's a bottle with powdered saline packets. They really help wash out the germs and dust. I feel that it helps shrink my swollen nasal passages as well.