An article in the Family Practice Journal summarized the research on treating chronic sinusitis. Intranasal steroids worked slightly better than placebo, and nasal salt irrigation was almost as effective as the steroids. Z-packs for 3 months did not improve symptoms. Surgery was about the same as medical therapy. Those of us in the alternative field might treat with Low-dose Antigens or with sinus injections with Procaine anesthetics. Reports are much better with the natural approach.
See the Journal of Family Practice, Nov, 2016, 829-831.