PLEASE, PLEASE be wary of any herbal meds! Hergal meds are not FDA approved and you can do yourself harm if you don't tx your asthma according to your MD's advice. The corticosteroids your MD prescribes are not the type you hear about over the news. They are a very low dose, only goes straight to the lungs and does not affect other body parts. One thing you need to remember is to rinse your mouth as corticosteroids will cause thrush. If your air purifier is not made for the entire house, it just doesn't work to the degree you need. Invest in a HEPA filter for your heating & a/c system. Change from curtains to blinds, rid your house of excess throw pillows, change to hardwood flooring if possible, don't use a fireplace or eat foods cooked over charcoal (some fast food restaurants use charbroiled cooking), place mattress protectors on your beds along w/pillow protectors also. These are just a few of the things which will make your life better. I don't log onto the computer on a daily basis, but just leave a question for me and I'll answer it at least on a weekly basis. There is so much you can do to help make your life better. Contact the American Lung Association and ask them to send you various literature. They supply me with pamphlets & booklets which I use in the patient education. Good luck!
Info meant for educational purpose & not as med advice.