I have had chronic Sinus problems for 40 years. Three operations, and no relief. However, since taking Mucostop and a daily Saline flush ( Neilmed ) I am having the most success ever. No or much reduced post nasal drip, less congestion too. When I feel good, I reduce my intake to 2 capsules once pef day. When I feel sinus congestion increasing, I increase. I would recommend this to all. Saline flush is crucial as well.