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Generic name: mometasone furoate monohydrate

What is Nasonex?

Nasonex Nasal Spray is a man-made (synthetic) corticosteroid medicine that is used to:

  • treat the nasal symptoms of seasonal and year-round allergic rhinitis (inflammation of the lining of the nose) in adults and children 2 years of age and older.
  • treat nasal congestion that happens with seasonal allergic rhinitis in adults and children 2 years of age and older.
  • prevent nasal symptoms of seasonal allergic rhinitis in people 12 years of age and older.
  • treat nasal polyps in people 18 years and older.

It is not known if Nasonex Nasal Spray is safe and effective in children under:

  • 2 years of age to treat allergic rhinitis.
  • 18 years of age to treat nasal polyps.

Who should not use Nasonex?

Do not use Nasonex if you are allergic to mometasone furoate or any of the ingredients in Nasonex. See the end of this leaflet for a complete list of ingredients in Nasonex.

What should I tell my healthcare provider before taking Nasonex?

Before you take Nasonex, tell your healthcare provider about all of your medical conditions, including if you:

  • have had recent nasal sores, nasal surgery, or nasal injury.
  • have eye or vision problems, such as cataracts, glaucoma (increased pressure in your eye), and blurred vision, or other changes in your vision.
  • have tuberculosis or any untreated fungal, bacterial, viral infections, or eye infections caused by herpes.
  • have been near someone who has chickenpox or measles.
  • are not feeling well or have any other symptoms that you do not understand.
  • are pregnant or planning to become pregnant. It is not known if Nasonex will harm your unborn baby. Talk to your healthcare provider if you are pregnant or plan to become pregnant.
  • are breastfeeding or planning to breastfeed. It is not known whether Nasonex passes into your breast milk.

Tell your healthcare provider about all the medicines you take including prescription and over-the-counter medicines, vitamins, and herbal supplements.

Especially tell your healthcare provider if you take:

  • certain medicines for HIV (such as ritonavir, atazanavir, indinavir, nelfinavir, and saquinavir)
  • cobicistat-containing products
  • certain antifungals (such as ketoconazole and itraconazole)
  • certain antibiotics (such as clarithromycin and telithromycin)
  • certain antidepressants (such as nefazodone)

If you take these medicines with Nasonex, your healthcare provider should monitor you for side effects.

Nasonex may affect the way other medicines work, and other medicines may affect how Nasonex works.

Know the medicines you take. Keep a list of them to show your healthcare provider and pharmacist when you get a new medicine.

How should I use Nasonex?

  • Use Nasonex exactly as prescribed by your healthcare provider.
  • This medicine is for use in the nose only. Do not spray it into your mouth or eyes.
  • An adult should help a young child use this medicine.
  • For best results, you should keep using Nasonex regularly each day without missing a dose. If you do miss a dose of Nasonex, take it as soon as you remember. However, do not take more than the daily dose prescribed by your healthcare provider.
  • Do not use Nasonex more often than prescribed. Ask your healthcare provider if you have any questions.
  • For detailed instructions on how to use Nasonex Nasal Spray, see the "instructions for use" that come with your medication.
  • See your healthcare provider regularly to check your symptoms while taking Nasonex and to check for side effects.

What should I avoid while taking Nasonex?

If you are taking other corticosteroid medicines for allergy, by mouth or injection, your healthcare provider may advise you to stop taking them after you begin using Nasonex.

What are the possible side effects of Nasonex?

Nasonex may cause serious side effects, including:

  • thrush (candida), a fungal infection in your nose and throat. Tell your healthcare provider if you have any redness or white colored patches in your nose or throat.
  • hole in the cartilage of the nose (nasal septal perforation). A whistling sound when you breathe may be a symptom of nasal septum perforation.
  • slow wound healing. Do not use Nasonex until your nose has healed if you have a sore in your nose, if you have surgery on your nose, or if your nose has been injured.
  • eye problems, including glaucoma, cataracts, and blurred vision. You should have regular eye exams.
  • allergic reactions. Allergic reactions including wheezing may happen after using Nasonex. If wheezing happens stop using Nasonex. Tell your healthcare provider or get medical help right away.
  • immune system problems that may increase your risk of infections. You are more likely to get infections if you take medicines that weaken your immune system. Avoid contact with people who have contagious diseases such as chicken pox or measles while using Nasonex. Symptoms of infection may include:
    • fever
    • pain
    • aches
    • chills
    • feeling tired
    • nausea
    • vomiting

Tell your healthcare provider about any signs of infection while you are using Nasonex.

  • adrenal insufficiency. Adrenal insufficiency is a condition in which the adrenal glands do not make enough steroid hormones. Symptoms of adrenal insufficiency can include:
    • tiredness
    • weakness
    • nausea and vomiting
    • low blood pressure
  • slowed growth in children. Your child's growth should be checked regularly while using Nasonex.

The most common side effects of Nasonex include:

  • headache
  • viral infection
  • sore throat
  • nosebleeds
  • cough

These are not all the possible side effects of Nasonex. Call your healthcare provider for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

General information about the safe and effective use of Nasonex

Medicines are sometimes prescribed for conditions that are not listed in a Patient Information leaflet. Do not use Nasonex for a condition for which it was not prescribed. Do not give Nasonex to other people even if they have the same symptoms you have. It may harm them.

You can ask your healthcare provider or pharmacist for information about Nasonex that is written for health professionals.

How should I store Nasonex?

  • Store Nasonex at room temperature between 59°F to 86°F (15°C to 30°C).
  • Protect from light.
  • Avoid prolonged exposure of Nasonex container to direct light.
  • Shake well before each use.
  • Keep Nasonex and all medicines out of the reach of children.

What are the ingredients in Nasonex?

Active ingredient: mometasone furoate monohydrate

Inactive ingredients: glycerin, microcrystalline cellulose and carboxymethylcellulose sodium, sodium citrate, citric acid, benzalkonium chloride, and polysorbate 80.

For more information call 1-800-622-4477.

Source: National Library of Medicine. Last updated July 24, 2019.