Mometasone is a steroid that prevents the release of hormones that cause inflammation. It is used to treat nasal symptoms of allergies. It can also be used to treat nasal polyps in adults.

Symptoms may take up to 2 weeks to improve. Inform doctor if symptoms don’t improve. Doctors may recommend you start Nasonex 2-4 weeks before allergy season. Shake well before use. If not used for >1 week, prime spray pump by spraying into the air until a fine mist appears. Don’t blow your nose for a few minutes after use. Dispose of medicine after 120 sprays, even if there is leftover medicine.

Before use, tell your doctor your medical history, especially if you’ve had/are experiencing glaucoma, cataracts, herpes simplex of the eyes, tuberculosis, sores/ulcers in nose, recent injury/surgery of the dose, or if you’ve recently had an infection. Inform your doctor of other medications you take, especially antibiotics, antifungals, antivirals that treat HIV/AIDS, and antidepressants. Avoid contact with eyes and people who may be sick/infected.

Contact your doctor if you have been exposed to chickenpox or measles, as these diseases can be fatal for people on steroid medication. Also contact your doctor as soon as you can if you encounter serious side effects such as: severe bleeding, increased nose drainage, headache, nose pain, breathing issues, white patches/sore in nose that don’t heal, vision issues, ear pain or ear drainage, hearing problems. Get emergency help if you suspect an allergic reaction. Long-term side effects of steroid use like the following should also be reported: weight gain, slow wound healing, thinning skin, increased body hair, irregular menstruation, fatigue, depression, anxiety. Other effects include: congestion, flu-like symptoms, nosebleed, headache.