Nasonex Nasal Spray (Mometasone)

(℞) Prescription Required

    Nasonex Nasal Spray (Mometasone) Dosage and Side Effects

    NASONEX is a corticosteroid, which reduces inflammation.

    Warnings and Precautions

    Do not spray NASONEX into your eyes or mouth. It is for use in the nose only.

    Before you use NASONEX talk to your doctor or pharmacist if you are pregnant or nursing a baby. Breast-feeding is not recommended during treatment with NASONEX.

    Tell your doctor, if you have any of the following conditions before you start using NASONEX or develop them during treatment. Your doctor may need to lower your dose of this medication, or you may need extra treatment to control the condition. Once advised, your doctor will decide whether any changes in your treatment are needed. In some cases it may be necessary to stop treatment.

    • sores in the nose
    • tuberculosis (active or previous)
    • infection (fungal, bacterial or viral)
    • herpes simplex (virus) infection of the eye

    If you think you have developed an infection in the nose after starting NASONEX (i.e. normally clear discharge from the nose has turned yellow or green) contact your doctor.

    If you have been prescribed NASONEX (but not with antibiotics) for mild-moderate uncomplicated acute rhinosinusitis, consult your doctor if you develop signs or symptoms of bacterial infection (such as fever, persistent severe facial/tooth pain (especially on one side of the face), facial swelling, worsening of symptoms after an initial improvement) or thick nasal discharge with a yellow or green colour.

    Be sure to use this medicine exactly as your doctor or pharmacist has instructed. Do not use more NASONEX than prescribed in an attempt to increase its effectiveness, and do not use this medicine more often than prescribed. Only a physician can prescribe NASONEX for you. Do not share this medicine with anyone else; it may harm them even if their symptoms are the same as yours. Do not use this product for other disorders.

    When it should not be used:

    NASONEX should not be used:

    • if you are allergic to NASONEX or to any of its ingredients.
    • if you have an infection in the nose (i.e. yellow or green discharge from the nose) that is not being treated.
    • if your nose was recently operated on or injured. In this case you may be told to wait until healing has occurred before using NASONEX.
    • if you have been diagnosed with tuberculosis and it is not being treated.
    • if you have untreated fungal, bacterial, or systemic viral infections.
    • if you have a herpes simplex (virus) infection of the eye and it is not being treated

    Side Effects

    Side effects that may occur with the use of corticosteroid nasal sprays, including NASONEX, are headache, nose-bleed or blood-tinged mucus, burning or irritation inside the nose, sneezing or sore throat.

    Disturbances of taste and smell have been reported very rarely.

    The following less common side effects have been seen in Clinical Trials: swollen lymph nodes, vision changes, eye tearing, dry eyes, eye inflammation or infection, ear ache, ringing in the ears, stomach pain, constipation, diarrhea, nausea, tongue and tooth disorders, dry mouth, aggravated allergy symptoms, swelling of the body including the face, fever, flu-like symptoms, thirst, cold sore, infections, muscle and/or joint pain, tremor, dizziness, migraine, depression, nightmares causing sleep disturbances, fatigue, loss of voice, bronchitis, shortness of breath, wheezing, acne, skin rashes and high blood pressure.

    Interactions with this medication

    To avoid the possibility of drug interactions, be sure to advise your physician or pharmacist of any other medications that you are taking, particularly corticosteroid medicine, either by mouth or by injection. The dose of some medications may need adjustment while you are treated with NASONEX.

    Drugs that may interact with NASONEX include:

    • Ketoconazole

    Proper Use of this medication


    Usual dose:

    In case of severe nasal congestion, your doctor may recommend the use of a nasal decongestant (vasoconstrictor) 2-3 days before NASONEX to help clear nasal passages and to aid drug delivery.

    Treatment of seasonal or perennial allergic rhinitis:

    • For children between the ages of 3 and 11 years the usual recommended dose is one (1) spray in each nostril once a day. Young children should be aided by an adult when using NASONEX.
    • For adults (including the elderly) and children 12 years of age and older, the usual recommended dose is two (2) sprays into each nostril once a day. When your symptoms are under control, your physician may recommend one (1) spray into each nostril once daily to maintain control of your symptoms.

    Your physician may change this dosage, depending on your response to NASONEX.

    In some patients, NASONEX may relieve symptoms within 12 hours; others may have to wait at least 48 hours. Full effect depends on regular and continued use (unlike other medications which are used only when necessary). For full benefit of therapy, continue regular use.

    Adjunctive treatment to antibiotics in acute episodes of rhinosinusitis:

    For adults (including the elderly) and children 12 years of age and older, the usual recommended dose is two (2) sprays into each nostril twice a day. If needed for better control of your symptoms, your doctor may recommend that the dose be increased to four (4) sprays into each nostril twice daily.

    Your physician may change this dosage, depending on your response to NASONEX.

    Treatment of mild to moderate uncomplicated acute rhinosinusitis:

    For adults (including the elderly) and children 12 years of age and older, the usual recommended dose is two (2) sprays into each nostril twice a day.

    Contact your doctor if symptoms worsen during treatment.

    Treatment of Nasal Polyps:

    For adults 18 years and older (including the elderly), the usual recommended dose is two (2) sprays into each nostril twice a day. Once symptoms are controlled, your physician may reduce your dose to two sprays in each nostril once daily.


    In case of drug overdose, contact a health care practitioner, hospital emergency department or regional Poison Control Centre immediately, even if there are no symptoms.

    Missed dose:

    If you miss taking your dose on time, do not worry; take a dose if you remember within an hour or so. However, if you do not remember until later, skip the missed dose and go back to your regular dosing schedule. Do not double the dose.


    To clean the nasal applicator, remove the plastic dust cap and pull gently upward on the white nasal applicator so that it comes free. Wash the applicator and dust cap under a cold-water tap. Do not try to unblock the nasal applicator by inserting a pin or other sharp object as this will damage the applicator and cause you not to get the right dose of medicine. Dry and replace the nasal applicator followed by the plastic dust cap.

    Re-prime the pump with two (2) sprays when first used after cleaning.

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    The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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