Dick, when I had something similar a couple of years back I went into Holland & Barrett and got something called "New Era for Catarrh and Sinus Disorders"...you take 4 at once & dissolve them on your tongue. Looking at the packaging now the main ingredients seem to be Iron Phosphate, Potassium Chloride, Potassium Sulphite and salt. No idea of the science (if any) behind it, but it did work for me.