no i dont have asthma, or any abnormalities, just hard to get deep breath and chest heaviness, and since not really any bad side effects, i asked if i could try it, and have chronic sinus congestion so not seasonal allergies, i thought you had to take 20 mg, i am taking 8mg now, and wanted to know if thats too low, and if i should have felt difference by now, taking for a week, thanks so miuch for all your replies, radha