I love nutribiotic products but this one and the allergy spray as well did not help my sinuses but to aggravate them really bad. I'm not clear as to why this happened because I have used the GSE drops in my saline rinse with no problems. There is something in the sprays irritating the membranes and making me swell. I'm so bummed because I've a drawer full of nasal sprays that just do not work. It could be a sensitivity I have to whatever all nasal sprays have in common and I'm not sure what that would be.If you have used nasal sprays with little or no problem then go ahead and use but if you have had issues with numerous other sprays then I suggest to stick to nasal irrigation or neti rinse. Sorry I had to leave negative feedback but the product was very harsh to my poor nose.