• Provides 24-hour allergy relief with one daily spray
  • Targets nasal congestion and sinus pressure directly
  • Non-drowsy formula suitable for daytime use

How it works?

Online Consultation

We ask you to complete a quick and easy consultation and get you started.

Choose condition

We have a selection of treatments available for various conditions.

Express Delivery

You will have complete visibility and control of your delivery.
Notice!

Before ordering this treatment, you may have to complete an online consultation

Overview

When hayfever or allergies block your nose and weigh you down, relief can feel out of reach. Nasonex is a trusted steroid nasal spray that tackles inflammation at its source — easing congestion, sneezing, and irritation so you can breathe freely again. Used once daily, it provides powerful, targeted relief without drowsiness, helping you stay clear-headed, comfortable, and in control all season long.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.


What is Nasonex


Nasonex Nasal Spray contains mometasone furoate, a corticosteroid that works directly inside the nose to reduce inflammation and swelling caused by allergies. Unlike antihistamines, which only block histamine, Nasonex tackles the underlying nasal inflammation — making it especially effective for congestion and sinus-related symptoms.

With just one daily dose, Nasonex provides 24-hour relief from sneezing, a runny or blocked nose, and itching of the nose or eyes. Because it is non-drowsy, it can be used confidently during the day without affecting concentration or alertness.

Nasonex is suitable for both seasonal hay fever and year-round allergies (perennial rhinitis), offering reliable, targeted relief so you can breathe more easily and feel more comfortable.

Directions

  • Standard adult dose: Two sprays in each nostril once daily
  • Once symptoms are controlled, your prescriber may reduce to one spray per nostril once daily
  • Shake the bottle gently before use
  • Prime the spray if using for the first time (or after several days of non-use)


Always follow the exact instructions given by your prescriber.

Side Effects

Like all medicines, Nasonex (mometasone nasal spray) can cause side effects, although not everyone will experience them. Most are mild and improve as your body adjusts to treatment.

Common (may affect up to 1 in 10 people):

  • Nosebleeds – usually mild and short-lived.
  • Irritation or burning in the nose – a stinging or itchy sensation may occur after spraying.
  • Sore throat – throat discomfort or mild pain can sometimes develop.
  • Headache – usually mild and temporary.

 

Uncommon (may affect up to 1 in 100 people):

  • Altered sense of taste or smell – some people may notice changes, but this usually improves with continued use.
  • Dryness in the nose or throat – a dry or uncomfortable feeling may occur but is generally mild.

 

Rare (seek urgent medical advice):

  • Severe allergic reaction (anaphylaxis) – symptoms include rash, itching, swelling of the face, lips, tongue or throat, or difficulty breathing. This is very rare but requires immediate emergency care.
  • Eye pain or blurred vision – may be a sign of increased pressure in the eye; seek medical advice promptly if this occurs.

 

Most people tolerate Nasonex well, and side effects are generally mild. If you are worried about any symptoms, or if they do not improve, speak to your doctor, pharmacist, or prescriber.

Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet provided with your medicine for full details. If you experience severe or worrying symptoms, seek medical advice straight away. In an emergency, call 999 or go to A&E.

Warnings

Nasonex may not be suitable if you:

  • Are allergic to mometasone or any spray ingredients
  • Have frequent or unexplained nosebleeds
  • Have untreated infections in the nose or sinuses
  • Are pregnant or breastfeeding (seek prescriber advice)
  • Are using other steroid medicines (risk of additive effects)
Frequently asked questions

  • What is Nasonex and what is it used for?

    Nasonex is a branded nasal spray containing mometasone, a corticosteroid used to treat hay fever, nasal allergies and persistent congestion. It reduces swelling inside the nose, helping ease sneezing, itching, runny nose and blocked nose. Many people choose Nasonex when antihistamines alone aren’t enough.

  • How does Nasonex help treat hay fever and nasal allergies?

    Nasonex reduces inflammation inside the nasal passages, which is the main cause of allergy symptoms. It relieves congestion, itching, sneezing and a runny nose by calming your immune response to pollen or other triggers.

  • How long does Nasonex take to start working?

    Some people notice improvement within 12 hours, but it often takes a couple of days to work fully. Regular daily use during allergy season provides the best symptom control.

  • How do I use Nasonex correctly for best results?

    Shake the bottle, blow your nose gently, then spray into each nostril while aiming slightly outward. Avoid spraying the middle of your nose to reduce irritation. Use it consistently every day to maintain control through the season.

  • Is Nasonex better than over-the-counter nasal sprays?

    Nasonex targets inflammation directly, making it more effective for congestion and long-lasting allergy symptoms than simple decongestants or saline sprays. Many people find it gives stronger and more consistent relief when symptoms affect daily life.

  • Who should avoid using Nasonex?

    Nasonex may not be suitable if you have recent nasal surgery, frequent nosebleeds, untreated infections or take other steroid medicines. A clinician can advise if you have long-term health conditions or use regular prescriptions.

  • Can I use Nasonex with antihistamines or eye drops?

    Yes. Nasonex works well alongside antihistamine tablets or anti-allergy eye drops, especially during peak pollen months. Combination treatment often gives better control of both nasal and eye symptoms.

  • Is Nasonex stronger or more effective than cheaper steroid sprays?

    Nasonex contains mometasone, which is a modern corticosteroid known for strong anti-inflammatory effects with very low absorption into the body. Some people find it more effective for stubborn congestion compared with older or OTC steroid sprays. A clinician can help you choose the right option.

  • Can Nasonex help with nasal polyps or long-term congestion?

    Yes. Mometasone is often used for long-term congestion caused by polyps or chronic nasal inflammation. It reduces swelling inside the nose and may improve breathing over several weeks. You should still speak to a clinician for personalised guidance.

  • Does Nasonex cause dryness, irritation or nosebleeds?

    Mild dryness or irritation can happen at first. Nosebleeds are more likely if the spray is pointed toward the middle of your nose. Aiming slightly outward and using gentle technique usually reduces these effects.

  • Can I use Nasonex every day during allergy season?

    Yes. Daily use is recommended through pollen season, as Nasonex works gradually. Many people use it from early spring until symptoms settle in late summer. If you require it all year, discuss this with a clinician.

  • What should I do if I miss a dose of Nasonex?

    Take the missed dose as soon as you remember unless it is close to the next one. Do not double up. Consistent, daily use is key for reliable allergy control, so try to take it at the same time each day.

  • Can Nasonex be used in children or teenagers?

    Nasonex can be used in children in certain circumstances, but dosing and suitability depend on age. A clinician or pharmacist should advise before use in anyone under 18 to ensure the correct treatment plan.

  • Is Nasonex safe to use long term?

    Yes. Only tiny amounts are absorbed into the bloodstream, making it safe for long-term seasonal use. Some people use Nasonex for months each year with no issues. Ongoing review is recommended if you need it year-round.

  • Can I switch between Nasonex and other mometasone brands?

    Yes. The active ingredient is the same, so most people can switch between brands without problems. However, bottle design, spray pattern and dosing instructions may vary slightly. Follow the guidance on the product you are using.