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Nasonex (Mometasone) Nasal Spray 50mcg (140 Dose)

Nasonex (Mometasone) Nasal Spray 50mcg (140 Dose)

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Nasonex Nasal Spray for Effective Allergy Relief

 

You can rely on this corticosteroid nasal spray to manage symptoms of allergic rhinitis and nasal polyps. The active ingredient mometasone furoate works directly in your nasal passages to reduce inflammation and provide relief from congestion, sneezing, and runny nose. Each spray delivers 50 micrograms of mometasone, giving you consistent dosing for reliable symptom control.

This prescription medicine is formulated to treat both seasonal and perennial allergic rhinitis. You'll find it particularly effective for managing hay fever symptoms during pollen season, as well as year-round allergies caused by dust mites, pet dander, or mould. The 140-dose bottle provides approximately one month's treatment when used as directed.

 

How Mometasone Reduces Nasal Inflammation

 

When you use this spray, mometasone furoate acts as a synthetic corticosteroid that mimics your body's natural anti-inflammatory hormones. It works by binding to glucocorticoid receptors in your nasal tissue, which then reduces the production of inflammatory substances like histamine and leukotrienes.

You'll typically notice improvement in your symptoms within 12 hours of your first dose, though maximum benefit usually occurs after several days of regular use. The medicine works locally in your nasal passages, which means minimal absorption into your bloodstream and fewer systemic side effects compared to oral corticosteroids.

 

Who Benefits from This Allergy Treatment

 

This nasonex nasal spray is suitable for adults and children over 3 years of age who suffer from allergic rhinitis or nasal polyps. You may find it particularly helpful if you experience persistent nasal symptoms that interfere with your daily activities or sleep quality. Many patients with allergy and hay fever conditions benefit from the targeted relief this medicine provides.

The spray is especially beneficial if you need:

  • Long-term management of chronic allergic rhinitis symptoms
  • Prevention of seasonal allergy symptoms before pollen season begins
  • Treatment of nasal polyps that cause breathing difficulties
  • An alternative to oral antihistamines that may cause drowsiness

 

Why This Formulation Works Effectively

 

The aqueous suspension formula ensures even distribution of the active ingredient throughout your nasal passages. Unlike some older nasal sprays, this formulation doesn't contain alcohol or other irritating solvents that might cause stinging or burning sensations when you apply it.

You can use this medicine safely for extended periods under medical supervision, as the risk of nasal tissue damage is minimal compared to decongestant sprays. The metered-dose pump delivers a consistent amount of medication with each spray, ensuring you receive the correct dose every time.

 

Storage and Handling Requirements

 

You should store this medicine at room temperature, below 25°C, and keep it away from direct sunlight. Don't freeze the bottle, as this can affect the suspension's consistency and effectiveness. Before each use, you'll need to shake the bottle gently to ensure the medication is properly mixed.

The spray pump should be primed before first use by pressing it several times until a fine mist appears. If you haven't used the spray for more than a week, you'll need to re-prime it before your next dose.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

 

Recommended Dosage for Adults and Children

For adults and children over 12 years, you should use two sprays in each nostril once daily, preferably in the morning. Children aged 3 to 11 years typically require one spray in each nostril once daily. Your doctor may adjust this dosage based on your symptoms and response to treatment.

You should use the lowest effective dose that controls your symptoms. Once your symptoms are well-controlled, your doctor may reduce the dose to maintain symptom relief while minimising potential side effects.

Proper Application Technique

Before using the spray, you should gently blow your nose to clear your nasal passages. Shake the bottle well and remove the dust cap. Insert the nozzle into one nostril while closing the other nostril with your finger. Tilt your head slightly forward and breathe in gently through your nose while pressing down firmly on the pump.

After spraying, you should breathe out through your mouth and repeat the process in the other nostril if directed. Wipe the nozzle clean with a tissue and replace the dust cap. You should rinse your mouth with water after use to prevent any medication from remaining in your throat.

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Understanding Potential Side Effects

Like all medicines, Nasonex can have side effects, although not everyone will experience them. Most people tolerate this medication well, but you should be aware of possible reactions. If you're managing multiple health conditions, you might also benefit from exploring other treatment options in our ear nose throat collection.

The most commonly reported side effects include nosebleeds, headache, and nasal irritation. These effects are usually mild and tend to decrease as your body adjusts to the medication.

You may experience any of the following side effects:

  • Nosebleeds or blood-tinged nasal discharge
  • Headache or dizziness
  • Nasal burning or stinging sensation
  • Sneezing fits immediately after use
  • Dry or crusty nasal passages
  • Altered sense of taste or smell
  • Throat irritation or cough
  • Nausea or stomach upset
  • Nasal septum perforation (rare, with long-term use)
  • Increased susceptibility to nasal infections
  • Growth retardation in children (with prolonged use)
  • Adrenal suppression (rare, with high doses)

If you experience these or any other side effects, speak to your doctor or pharmacist right away. For more information about reporting side effects please see the MHRA Yellow Card Scheme.

Frequently Asked Question


Nasonex is used to treat allergic rhinitis (hay fever), non-allergic rhinitis, and nasal polyps. It helps reduce inflammation, congestion, sneezing, and runny nose.


Some people feel relief within 12–24 hours, but full effectiveness may take a few days of consistent use.


Yes. It is designed for daily use as prescribed. Continuous use helps maintain symptom control.


When used at the recommended dose, Nasonex is generally safe long-term. However, regular medical reviews are advised if used for extended periods.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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What is Nasonex Nasal Spray used for?


Nasonex is used to treat allergic rhinitis (hay fever), non-allergic rhinitis, and nasal polyps. It helps reduce inflammation, congestion, sneezing, and runny nose.

How long does Nasonex take to work?


Some people feel relief within 12–24 hours, but full effectiveness may take a few days of consistent use.

Can I use Nasonex every day?


Yes. It is designed for daily use as prescribed. Continuous use helps maintain symptom control.

Is Nasonex safe for long-term use?


When used at the recommended dose, Nasonex is generally safe long-term. However, regular medical reviews are advised if used for extended periods.