Mometasone Furoate is a Hay fever Nasal Spray which is used to treat and prevent various hay fever symptoms such as sneezing, itching and a blocked or runny nose. It contains the active ingredient known as Mometasone Furoate which is a steroid with anti-inflammatory purpose. Steroids are man-made hormones; hormones that are normally produced by the bodies' adrenal glands. When the steroid is sprayed, it immediately starts to reduce inflammation. While usually used for treating various hay fever symptoms, it can also be used to treat nasal polyps. With Mometasone nasal spray helping reduce the inflammation, the polyps progressively shrink, removing any feeling of a blocked nose and or breathing problems.