Nasonex (mometasone) is a steroid. It prevents the release of substances in the body that cause inflammation.
Nasonex nasal spray is used to treat nasal symptoms of seasonal or year-round allergies, including congestion, sneezing, and runny nose. This medicine is approved for this use in adults and children who are at least 2 years old.
Nasonex is also used to prevent seasonal allergy symptoms in adults and children who are at least 12 years old.
Nasonex nasal spray is used to treat nasal polyps only in adults.
