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Nasonex

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

Medically reviewed on January 15, 2018.

What is mometasone nasal?

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

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

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

Mometasone is used to treat nasal polyps only in adults.

Mometasone may also be used for other purposes not listed in this medication guide.

Important Information

Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

Before taking this medicine

You should not use this medicine if you are allergic to mometasone.

To make sure mometasone nasal 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 this medicine 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 mometasone nasal.

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

How should I use mometasone nasal?

Use this medication 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. Mometasone nasal is for use only in your nose.

Your doctor may recommend you start using mometasone nasal 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 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 the medication as directed and tell your doctor if your symptoms do not improve.

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

Store mometasone nasal 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.

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 nasal 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 mometasone nasal?

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.

Mometasone nasal side effects

Get emergency medical help if you have signs of an allergic reaction: 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 side effects may include:

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 mometasone nasal?

Other drugs may interact with mometasone nasal, 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.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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