• 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

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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)

FAQ's

How quickly does Nasonex work?
Some people notice relief within 12 hours, but it can take 2–3 days of regular use for full effect.

Can I use Nasonex every day during pollen season?
Yes, it’s designed for daily use when prescribed, but the lowest effective dose should be used.

Does Nasonex cause drowsiness?
No, it works locally in the nose and does not usually cause drowsiness.

Is Nasonex safe for long-term use?
Yes, under medical supervision. Long-term use should always be monitored by a prescriber.

Can children use Nasonex?
Lower doses may be prescribed for children. Always follow medical advice.

What if I forget a dose?
Use it when you remember, but do not double-dose.