Nasonex Nasal Spray is a corticosteroid that works locally in the nose, but it can still cause side effects and may not be suitable for everyone.
Before using Nasonex, tell your healthcare provider about your medical conditions, allergies, current infections, pregnancy or breastfeeding status, and all medications you use.
Serious Allergic Reactions
Do not use Nasonex if you are allergic to mometasone furoate or any ingredient in the medication.
Seek immediate medical attention if you develop:
- Difficulty breathing
- Swelling of the face, lips, tongue, or throat
- Hives
- A severe skin reaction
Serious or Persistent Nosebleeds
Nasonex can cause nasal irritation and nosebleeds.
Contact your healthcare provider if nosebleeds are frequent, severe, or do not stop easily.
Tuberculosis and Other Infections
Tell your healthcare provider if you have tuberculosis or another active or untreated infection.
Corticosteroids can suppress parts of the immune response and may make certain infections harder to control.
You should also tell your provider if you have recently been exposed to serious infections.
Nasal Irritation
Nasonex may cause dryness, burning, irritation, or soreness inside the nose.
Use the spray exactly as directed and aim it away from the nasal septum, which is the wall between the nostrils.
Contact your healthcare provider if irritation becomes severe or persistent.
Eye Conditions
Tell your healthcare provider if you have cataracts or glaucoma.
Long-term corticosteroid use may increase the risk of cataracts or elevated pressure inside the eye.
Report blurred vision, eye pain, or other new vision changes.
Pregnancy
If you are pregnant, planning to become pregnant, or think you may be pregnant, talk to your healthcare provider before using Nasonex.
Your provider will determine whether treatment is appropriate based on the expected benefits and potential risks.
Breastfeeding
Talk to your healthcare provider before using Nasonex while breastfeeding.
Your provider can determine whether mometasone nasal spray is appropriate based on your treatment needs and the potential for exposure to the nursing infant.
Liver Problems
Tell your healthcare provider if you have liver disease.
Mometasone is processed by the liver, and significant liver impairment may increase the amount of medication in the body.
Closer monitoring may be appropriate in some patients.
Drug Interactions
Nasonex can interact with certain medications, especially drugs that strongly affect how corticosteroids are broken down in the body.
Tell your healthcare provider and pharmacist about all prescription medications, over-the-counter products, vitamins, and supplements you use.
Immune System Effects
Although Nasonex is applied locally in the nose, corticosteroids can suppress immune function, particularly with prolonged use or higher exposure.
Contact your healthcare provider if you develop persistent fever, unusual infections, or symptoms that do not improve.
Bone Health
Long-term or excessive corticosteroid exposure may contribute to reduced bone mineral density and increase the risk of osteoporosis or fractures.
This risk is generally lower with nasal corticosteroids than with oral corticosteroids, but it may still be important in people with other osteoporosis risk factors.
Use in Children
Nasonex may be prescribed for allergic rhinitis in children 2 years of age and older.
The safety and effectiveness of the product have not been established for allergic rhinitis in children younger than 2 years.
Children using corticosteroid nasal sprays for extended periods may require monitoring of growth.
Use Nasonex Only as Directed
Do not use more sprays, use Nasonex more often, or continue treatment longer than prescribed.
Using more than recommended does not provide faster relief and may increase the risk of local or systemic corticosteroid side effects.
Contact your healthcare provider if your symptoms worsen, fail to improve, or you develop persistent nosebleeds, vision changes, or signs of infection.
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