<<Disclaimer: Verify this information before applying it to your situation.>> A few winters ago I had a cough due to post nasal drip that didn't respond to antibiotics. It got so bad that I had a hard time getting my breath when I started coughing. Finally I had a CBC (complete blood count) done and my eosinophil count was elevated. So they said I had an allergy and prescribed antihistamines and an inhaler. It did the trick. The funny part is that I was less bothered by it the following winter and every winter since then. Since I was never allergy tested, I have no idea what the allergy was due to or even if it really was an allergy. But the bottom line is that it seemed to have nothing to do with having celiac sprue. Ellen Eagan SF,CA