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Nasonex is a nasal spray that contains the active ingredient mometasone furoate (a corticosteroid) which helps to relieve symptoms of hayfever & allergies by reducing inflammation. Nasonex is also available as a generic product Mometasone

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ABOUT Nasonex

Buy Nasonex nasal spray online

Buying Nasonex nasal spray online from Chemist Click is simple. Follow these steps:

  • Fill out the Nasonex nasal spray consultation form
  • Our registered pharmacists will review
  • Once approved, your order will be dispatched immediately. Next-day delivery options are available

What is Nasonex nasal spray?

Nasonex is a steroid nasal spray used to treat the symptoms of hay fever and allergic rhinitis

Nasonex nasal spray prevents and treats the common symptoms of allergies, such as congestion, a runny and itchy nose, sneezing, and watery or red eyes. 

The active ingredient in Nasonex is mometasone furoate, a steroid that reduces inflammation. It is part of a family of medicines known as glucocorticoids. 

Nasonex nasal spray is prescription-only medicine, which means you need to be prescribed it by a doctor or pharmacist to buy it. 

Nasonex nasal spray uses

Nasonex nasal spray is used to prevent and treat allergy symptoms. It is effective in addressing the symptoms of both seasonal allergies (hay fever) and year-round allergies. 

Among the common allergy symptoms that Nasonex nasal spray can treat are:

  • A runny nose
  • A blocked nose
  • Itching
  • Sneezing
  • Congestion


Nasonex can also be used to treat nasal polyps — soft growths in the nose. These aren’t usually serious, but can continue to grow and may block your nose if left untreated. Steroid sprays like Nasonex helps to shrink nasal polyps.

Mometasone furoate, the active ingredient in Nasonex, is also available in an inhaler, as a treatment for chronic obstructive pulmonary disease (COPD) and asthma. It also comes in a cream to treat skin conditions like eczema and psoriasis.

Both adults and children can take Nasonex nasal spray.

How does Nasonex work?

Nasonex contains the active ingredient mometasone furoate — a type of steroid. 

When the treatment is sprayed up the nasal passage, mometasone furoate is released and absorbed into the cells in the nasal lining. This prevents these cells from releasing the chemicals that normally trigger inflammation and allergy reactions.

By blocking this reaction, Nasonex reduces irritation and swelling, which relieves other symptoms such as sneezing, itchiness or a blocked nose. 

How to use Nasonex

Nasonex nasal spray is very simple to use. You can follow these instructions on how to use Nasonex:

  • Before using the spray, blow your nose gently to remove any mucus and clear your airways
  • Using your finger, close one of your nostrils and tilt your head forward
  • Put the nozzle inside the open nostril, and as you breathe in slowly, press on the nozzle and spray into the nostril once
  • Breathe out through your mouth


You can repeat the same process for spraying into your other nostril.

You can also find full instructions on how to use Nasonex in the patient information leaflet enclosed with your treatment.

Nasonex dosage

The correct Nasonex dosage for you will depend on the condition you are using it to treat.

The normal dose of Nasonex nasal spray for treating allergies (including hayfever) is one or two sprays into each nostril, once per day. 

For nasal polyps, the normal dose is one or two sprays into each nostril, once or twice per day. 

Do not exceed the recommended dosage in a 24-hour period.

Instructions for the correct Nasonex dosage for you can be found either in the Nasonex patient information leaflet that comes with your treatment, or on the prescription label on your medicine box. 

Can I use Nasonex while pregnant?

There is little evidence that indicates Nasonex nasal spray can harm unborn babies.

However, using steroid nasal sprays like Nasonex while pregnant isn’t usually recommended by medical professionals, and your doctor is only likely to prescribe Nasonex if the risks are outweighed by the benefits. 

If you are pregnant or planning to get pregnant, you should tell your doctor before you buy Nasonex online or at a high street pharmacy.

Nasonex vs Avamys

Avamys nasal spray is the UK brand name for fluticasone nasal spray, which contains the active ingredient fluticasone furoate. 

Like Nasonex, Avamys is a steroid treatment used for the prevention and relief of hayfever and common allergy symptoms. The two medicines are both glucocorticoids and work similarly, reducing the inflammation that causes allergy symptoms.

Nasonex vs Flonase

Flonase is the US brand name for fluticasone nasal spray, sold under the brand name Avamys nasal spray in the UK. 

It is a steroid treatment that works in a similar way to Nasonex, reducing inflammation to prevent and relieve the common symptoms of allergies. 

Who should not use Nasonex?

Nasonex spray isn’t the right treatment option for everyone. There are some situations in which Nasonex might be be suitable for you.

Nasonex might not be suitable for people who: 

  • Are currently taking other steroid medicines
  • Are pregnant or trying to get pregnant
  • Have or have ever had tuberculosis
  • Have suffered from glaucoma or cataracts


If any of the above points apply to you, speak to your doctor or pharmacist about using Nasonex first. They will be able to tell you if it is safe to use, or suggest an alternative medicine.

Furthermore, do not use Nasonex if:

  • You are allergic to mometasone furoate or any of the other ingredients in Nasonex (a full list can be found in the patient information leaflet)
  • You have an untreated infection in your nose
  • You have recently had or are going to have an operation or surgery on your nose
  • You have recently injured your nose


In these situations, using a steroid-based nasal spray like Nasonex could damage your nose and do more harm than good. 

If you aren’t sure whether Nasonex is suitable for you or not, seek advice from your GP or pharmacist. 

Warnings and precautions

Talk to your doctor before using Nasonex if:

  • You have or have had tuberculosis in the past
  • You currently have any type of infection
  • You are taking any other steroid medication including tablets or injections
  • You have cystic fibrosis


Talk to your doctor if any of the following occur while you are using Nasonex:

  • You feel as though your immune system is not functioning well
  • You encounter anyone that suffers from measles or chickenpox
  • You get an infection in your nose or throat
  • You have been using this medication for several months
  • You have constant irritation in your throat or nose


If you are concerned at all about using Nasonex and its effect on your health, seek medical advice.

Can you buy Nasonex over the counter?

Nasonex nasal spray cannot be bought over the counter. To buy Nasonex, you need a prescription from a doctor or pharmacist.

Nasonex is available to purchase from our online pharmacy once you have completed a short consultation form. This will then be checked and approved by one of our qualified pharmacists, before it can be sent straight to your door through our reliable courier service. 

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Side Effects

What are the side effects of using Nasonex?

Although Nasonex side effects are unusual, they can still occur from time to time, so it’s important to be mindful of this. 

Among the common potential side effects of Nasonex nasal spray are:

  • Sneezing
  • Headaches
  • An unpleasant smell
  • Unpleasant taste
  • Dry mouth
  • Dry throat
  • A sore nose
  • Nosebleeds


These side effects are classified as ‘common side effects’, which means they are experienced by between one in 10 and 1 in 100 people. On the whole, Nasonex side effects are generally mild and should go away in time, once your body gets used to this medicine.

You should speak to your doctor if these side effects persist, or are bothering you.

Very few Nasonex users experience serious side effects but it’s important to seek medical assistance if you experience any of the following:

  • Difficulty breathing
  • Sores or any other damage inside your nose
  • Visual disturbances, including blurred vision or any other problems with eyesight


In very rare circumstances, Nasonex may cause a severe allergic reaction. Although these are very unusual, it’s important to be aware of these and to be able to recognise the signs of an allergic reaction. These include:

  • Swelling to the face, tongue or throat
  • Difficulty when trying to swallow 
  • Trouble breathing or wheezing
  • Hives (a raised, red, itchy rash on your skin)


If you experience any of the symptoms of an allergic reaction, immediately discontinue use of Nasonex and seek urgent medical attention. Severe allergic reactions should be treated as an emergency.

HOW TO USE Nasonex

Shake the bottle

Shake the bottle

Gently shake the bottle a few times as shown in the image

Remove dust cap and prime

Remove dust cap and prime

Remove the dust cap and hold the bottle as shown with your index and middle finger on the collar of the nozzle and your thumb underneath. If you are using your nasal spray for the first time or after a few days without use, press down with your index and middle finger until a fine mist is produced.

Blow your nose

Blow your nose

Blow your nose using clean towel or tissue to ensure your airways are clear

Administer spray

Administer spray

Hold the bottle as shown and using your other hand, place a finger on your nose to close one nostril. Put the nozzle into the other nostril as far as is comfortable. Tilt your head forward and keep the bottle upright. Start breathing in slowly through your nose and at the same time press down firmly on the collar of the bottle to release one spray.

Breathe out

Breathe out

Breathe out through your mouth. Repeat step 4 if you have been instructed to administer more than one spray in each nostril.

Administer in other nostril

Administer in other nostril

Repeat steps 4 and 5 to administer the spray in your other nostril

Use Nasonex exactly as you have been instructed by your GP or pharmacist.

Nasonex needs to be ‘primed’ before using it for the first time or after a few days of the spray not being used.

To prepare Nasonex:

  • Gently shake the bottle
  • Place your index and middle finger on either side of the collar of the bottle and your thumb on the bottom of the bottle
  • While facing the nozzle away from you, press down on the pump a few times until a fine mist is released to “prime” the pump
  • If you have not used your Nasonex for more than 10 days, you will need to re-prime the bottle

It is important to clean your Nasonex regularly to ensure it stays working properly

To clean Nasonex:

  • Take off the dust cap and gently pull on the nozzle to remove it
  • Use warm water to wash the nozzle and dust cap, then rinse them off under a running tap
  • Shake off any excess water and leave the dust cap and nozzle to dry in a warm place
  • Replace both the nozzle and the dust cap
  • Prime the spray again each time after cleaning it

Product Reviews For Nasonex


Nasonex reviews

Overall, people have found Nasonex nasal spray very effective in treating hayfever symptoms. 

Users of Nasonex have reported noticing the difference when they stopped using the medicine, with symptoms such as congested throat and runny nose becoming more prevalent. Those with seasonal allergies have commented that consistent use of Nasonex throughout the season makes it more effective. 

Much like other allergy nasal sprays, users may experience some side effects. A couple of reviewers stated they encountered mild side effects like headaches and stomach pains, but they tended to subside after a while. 

Many reviewers write that they have been taking Nasonex nasal spray for years to combat bad allergies, and that they can rely on this medication. Users said that although they can experience some side effects, the benefits certainly outweigh the downsides as Nasonex has helped them go about their daily lives without having to worry about disruptive allergy symptoms. 

Furthermore, users have said Nasonex helps them get a good night sleep as it can help unblock stuffy noses, preventing them from snoring. 

To find out about what Chemist Click’s customers are saying about Nasonex nasal spray, why not visit our Nasonex reviews page? 

Nasonex PRICES

*Please note: We do NOT charge a prescription fee

Medicine x1 Nasal Spray(s) x2 Nasal Spray(s) x3 Nasal Spray(s)
Nasonex 50mcg Nasal Spray(s) 13.89 23.99 35.97




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