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Generic Name: mometasone nasal (moe MET a sone)
Brand Names: Nasonex

What is Nasonex?

Nasonex (mometasone) is used to treat nasal symptoms of seasonal or year-round allergies, including congestion, sneezing, and runny nose. Nasonex is approved for this use in adults and children who are at least 2 years old.

Mometasone is a steroid. It prevents the release of substances in the body that cause inflammation.

Nasonex nasal spray is also used to prevent seasonal allergy symptoms in adults and children who are at least 12 years old.

Nasonex nasal spray is also used to treat nasal polyps only in adults.

Important information

Before using Nasonex, tell your doctor if you have been sick or had an infection of any kind. Also tell your doctor if you have glaucoma or cataracts, herpes simplex infection of your eyes, tuberculosis, sores or ulcers in your nose, or if you have recently had injury of or surgery on your nose.

Slideshow: Top Prevention Tips - Seasonal Allergies

It may take up to 2 weeks of using Nasonex nasal spray before your symptoms improve. For best results, keep using the medication as directed. Talk with your doctor if your symptoms do not improve after a week of treatment.

Nasonex can lower the blood cells that help your body fight infections. Avoid being near people who are sick or have infections. Call your doctor for preventive treatment if you are exposed to chicken pox or measles. These conditions can be serious or even fatal in people who are using Nasonex.

Avoid getting Nasonex in your eyes. If this does happen, rinse with water and call your doctor.

Before taking this medicine

You should not use Nasonex nasal spray if you are allergic to mometasone.

To make sure Nasonex is safe for you, tell your doctor if you have:

  • an active or recent infection;

  • glaucoma or cataracts;

  • herpes simplex virus of your eyes;

  • tuberculosis or any other infection or illness;

  • sores or ulcers inside your nose; or

  • a recent history of nasal surgery or injury to your nose.

It is not known whether Nasonex will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It is not known whether mometasone nasal passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Steroid medicine can affect growth in children. Tell your doctor if your child is not growing at a normal rate while using Nasonex.

Nasonex is not approved for use by anyone younger than 2 years old.

How should I use Nasonex?

Use Nasonex nasal spray exactly as it was prescribed for you. Do not use the medication in larger amounts, or use it for longer than recommended by your doctor. Follow the directions on your prescription label.

Do not take by mouth. Nasonex is for use only in your nose.

Your doctor may recommend you start using Nasonex 2 to 4 weeks before the start of allergy season.

Shake the nasal spray well just before each use. Before your first use, prime the nasal spray pump by spraying the medicine into the air until a fine mist appears.

To use the Nasonex nasal spray:

  • Blow your nose gently. Keep your head upright and insert the tip of the bottle into one nostril. Press your other nostril closed with your finger. Breathe in quickly and gently spray the medicine into your nose. Then use the spray in your other nostril.

  • Do not blow your nose for at least a few minutes after using the nasal spray.

  • Use only the number of sprays your doctor has prescribed.

  • If the spray gets in your eyes or mouth or on your skin, rinse with water.

  • If the nasal spray has not been used for longer than 1 week, prime it by spraying the medicine into the air until a fine mist appears.

Read all patient information, medication guides, and instruction sheets provided to you. Ask your doctor or pharmacist if you have any questions.

It may take up to 2 weeks before your symptoms improve. Keep using Nasonex as directed and tell your doctor if your symptoms do not improve.

While you are using Nasonex, your doctor may need to examine you to make sure the medicine is not harming your nose or sinuses.

Store Nasonex in an upright position at room temperature, away from moisture and heat.

Throw the medicine away after you have used 120 sprays, even if there is still medicine left in the bottle.

Nasonex dosing information

Usual Adult Dose of Nasonex for Allergic Rhinitis:

2 sprays in each nostril once a day.

When used for the prevention of allergic rhinitis, treatment should begin 2-4 weeks prior to pollen season.

Usual Adult Dose of Nasonex for Nasal Polyps:

2 sprays in each nostril twice daily. 2 sprays in each nostril once daily may be effective in some patients.

Usual Pediatric Dose of Nasonex for Allergic Rhinitis:

2 years to 11 years:
1 spray in each nostril once a day.

12 years or older:
2 sprays in each nostril once a day.

When used for the prevention of allergic rhinitis, treatment should begin 2 to 4 weeks prior to pollen season.

What happens if I miss a dose?

Use the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not use extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

An overdose of mometasone is not expected to produce life threatening symptoms. However, long term use of high steroid doses can lead to symptoms such as thinning skin, easy bruising, changes in the shape or location of body fat (especially in your face, neck, back, and waist), increased acne or facial hair, menstrual problems, impotence, or loss of interest in sex.

What should I avoid while using Nasonex?

Rinse with water if this medicine gets in your eyes.

Avoid being near people who are sick or have infections. Call your doctor for preventive treatment if you are exposed to chicken pox or measles. These conditions can be serious or even fatal in people who are using steroid medicine.

Nasonex side effects

Get emergency medical help if you have signs of an allergic reaction to Nasonex: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • severe or ongoing nosebleed;

  • white patches or sores in the nose that won't heal;

  • wheezing, trouble breathing;

  • vision problems; or

  • fever, chills, body aches, flu symptoms.

Although the risk of serious side effects is low when mometasone is used in the nose, side effects can occur if the medicine is absorbed into your bloodstream. Tell your doctor if you have possible signs of long-term steroid use:

  • weight gain (especially in your face or your upper back and torso);

  • slow wound healing, thinning skin, increased body hair;

  • changes in sexual function; or

  • muscle weakness, tired feeling, depression, anxiety, or feeling irritable.

Common Nasonex side effects may include:

  • headache;

  • stuffy nose, sore throat, cough; or

  • flu-like symptoms.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

What other drugs will affect Nasonex?

Other drugs may interact with mometasone, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using.

Where can I get more information?

  • Your pharmacist can provide more information about Nasonex.
  • Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Nasonex only for the indication prescribed.
  • Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2016 Cerner Multum, Inc. Version: 7.01. Revision Date: 2016-01-13, 12:11:04 PM.

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