I seen somone else recomended grapefruitseed extract. I HIGHLY recomend it, it has been miracle stuff for me. you can find it at a healthfood store. I take it for a variety of reasons, and my sinus condition is one of them. Only I take alot more than the directions say. If I am having a really hard time of it, I'll take up to 50 drops in some grapefruit juice. You almost cant stand it unless you take it in grapefruit or orange juice. It has a very very strong grapefruit tast to it.