My Asthma seems to respond to the Maxair within about 10 minutes. My Asthma is mild cough-variant, and my doctor seemed to think that the Maxair was adequate for me as a rescue inhaler. Thanks for letting me know that the Maxair is free of sulfa. <big sigh of relief> I can't use Proventil because of heart rhythm abnormalities (premature heartbeat) that are aggravated by using Proventil. Have you tried the over-the-counter Primatene Mist, or do you need something stronger than that when you get an Asthma attack? There is a version of Primatene that's supposed to be sulfite-free. Have you ever tried Vitamin B12 treatment for your sulfite sensitivity?
Thanks & take care,