I find Azelastine plus flonase also a great help on the post nasal drip. Right now it is ragweed season where I am and my nasal/dripping symptoms and coughing/sputum have increased like they always do at this time of the year. The sodium chloride 3% is helping with the sinus congestion/headache and in fact since I started using it I have had almost zero sinus headaches as it opens up those passages as well as my lungs (some how?) Again since using sodium chloride 3# and azelastine I am not actually having any exacerbation and I can tell because my breathing is not worse and my heart rate has not increased. I get allergy shots but they have not cured the issue and in past years I have ended up in the hospital from this fall allergy exacerbation problem but so far this year...knock on wood....I am handling it all better (I credit 3% sodium chloride plus 3 x a week azithromycin*not for everyone and problematic re resistance issues.) I also have that vasomotor rhinitis problem which certain smells and weather sets off that contributes to the problem. One doctor told me the sinuses nose and lungs are all one system and so one affects the other. It's a war. ps. my ct scans of sinuses don't show anything really wrong there. I find movement of any kind can set off the nose running coughing etc on some occasions because of increased blood flow to the nose etc. but other times exercise has no negative effect...no rhyme or reason to any of it.