Mometasone nasal spray is used to treat and prevent the symptoms (eg, stuffy or runny nose, itching, sneezing) of seasonal (short-term) and perennial (year-round) allergic rhinitis (hay fever). This medicine is also used to treat nasal polyps in adults.Reduces polyps size, nasal congestion, improves quality of life & sense of smell in Chronic Rhinosinusitis (CRS) with Nasal Polyposis