Momate nasal spray contains Mometasone as the active ingredient. Mometasone nasal spray is used to prevent and relieve symptoms of sneezing runny stuffy or itchy nose caused by hay fever or other allergies. It is also used to treat nasal polyps (swelling of the lining of the nose). Mometasone nasal spray is in a class of medications called corticosteroids. It works by blocking the release of certain natural substances that cause allergy symptoms.