<<Disclaimer: Verify this information before applying it to your situation.>> I have never been able to take any "sulfa" drugs or any myacins (?). As a child I spent years on pennicillan trying to get rid of never ending ear, strep, respiratory and sinus infections. I only have the occasional sinus infection now, but antibiotics work much better and faster although my dr does give me a few extra days to be sure. I've noticed many mentions of ear infections, but not itching in the ear, anyone notice that, especially if I may have had a minute gluten exposure. Carollee in Cold and Snowy New Hampshire