Package Leaflet: Information for the User
NASONEX 50 micrograms nasal spray suspension
Mometasone furoate
Read all of this leaflet carefully before you start using this medicine because it contains important information for you.
Contents of the pack
What is Nasonex?
Nasonex nasal spray contains mometasone furoate, a medicine that belongs to a group of medicines called corticosteroids. When mometasone furoate is sprayed into the nose, it can help to relieve inflammation (swelling and irritation of the nose), sneezing, itching, and nasal congestion or runny nose.
What is Nasonex used for?
Hay fever and perennial rhinitis
Nasonex is used to treat the symptoms of hay fever (also known as seasonal allergic rhinitis) and perennial rhinitis in adults and children aged 3 and older.
Hay fever, which occurs at certain times of the year, is an allergic reaction caused by breathing in pollen from trees, grasses, weeds, and also mold and fungus spores. Perennial rhinitis occurs throughout the year and symptoms can be caused by sensitivity to a variety of things including house dust mites, animal hair (or dander), feathers, and certain foods. Nasonex reduces the inflammation and irritation of your nose and thereby relieves sneezing, itching, and nasal congestion or runny nose caused by hay fever or perennial rhinitis.
Nasal polyps
Nasonex is used to treat nasal polyps in adults aged 18 and older.
Nasal polyps are small growths on the lining of the nose and usually affect both nostrils. Nasonex reduces the inflammation in the nose, causing the polyps to shrink gradually, thereby relieving nasal congestion that can affect your breathing through your nose.
Do not use Nasonex
Warnings and precautions
Consult your doctor or pharmacist before starting to use Nasonex.
While you are using Nasonex, consult your doctor
If corticosteroid nasal sprays are used at high doses for long periods of time, side effects can occur due to the medicine being absorbed into the body.
If your eyes are itchy or irritated, your doctor may advise you to use other treatments at the same time as Nasonex.
Consult your doctor if you experience blurred vision or other visual disturbances.
Children
When used at high doses for long periods of time, corticosteroid nasal sprays can cause side effects, such as slowing down the growth rate in children.
It is recommended to monitor the height of children on long-term treatment with nasal corticosteroids, and if any changes are noticed, you should inform your doctor.
Using Nasonex with other medicines
Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicines, including those obtained without a prescription.
If you are taking other corticosteroids for allergies, either orally or by injection, your doctor may advise you to stop taking them when you start using Nasonex. When stopping corticosteroids, either orally or by injection, some people may experience side effects such as muscle or joint pain, muscle weakness, and depression. You may also develop other allergies, such as itchy, watery eyes, or itchy, red, and blistered skin. If you develop any of these side effects, you should consult your doctor.
Some medicines may increase the effects of Nasonex, so your doctor will monitor you closely if you are taking these medicines (including some for HIV: ritonavir, cobicistat).
Pregnancy and breastfeeding
There is limited or no information on the use of Nasonex in pregnant women. It is not known whether Nasonex is excreted in breast milk.
If you are pregnant or breastfeeding, think you may be pregnant, or are planning to have a baby, consult your doctor or pharmacist before using this medicine.
Driving and using machines
There is no known information on the effects of Nasonex on driving or using machines.
Nasonex contains benzalkonium chloride
Benzalkonium chloride may cause irritation or inflammation inside the nose, especially when used for long periods of treatment.
Follow the instructions for administration of this medicine exactly as told by your doctor. If you are unsure, consult your doctor or pharmacist again. Do not use higher doses or use the spray more often, or for longer than your doctor tells you.
Treatment of hay fever and perennial rhinitis
Use in adults and children over 12 years of age
The usual dose is two sprays into each nostril once daily.
Use in children aged 3 to 11 years
The usual dose is one spray into each nostril once daily.
Nasonex may start to relieve symptoms within 12 hours of the first dose; however, it is unlikely that the full benefit of treatment will be seen before the first two days. You should keep using your nasal spray regularly to achieve the full benefit of treatment.
If you or your child has very severe hay fever, your doctor may advise you to start using Nasonex a few days before the start of the pollen season, as this will help to prevent hay fever symptoms from occurring.
Nasal polyps
Use in adults over 18 years of age
The usual initial dose is two sprays into each nostril once daily.
Preparing the nasal spray for use
Nasonex nasal spray has a cap that protects the nozzle and keeps it clean. Remember to remove it before using the spray and replace it after use.
If you are using the spray for the first time, you need to "prime" the bottle by pumping the spray 10 times until a fine spray is produced:
If you have not used your nasal spray for 14 days or more, you need to "prime" the bottle again by pumping the spray 2 times until a fine spray is produced.
How to use your nasal spray
Tilt your head slightly forward, keeping the bottle upright.
After using the spray, clean the nozzle carefully with a clean tissue or paper tissue and replace the cap.
Cleaning your nasal spray
If you use more Nasonex than you should
If you accidentally use more than you should, tell your doctor.
If you use corticosteroids for a long time or in large amounts, it can, on rare occasions, affect some of your hormones. In children, it can affect growth and development.
In case of overdose or accidental ingestion, consult your doctor or pharmacist immediately or call the Toxicology Information Service, stating the medicine and the amount taken. Telephone: 91 562 04 20
If you forget to use Nasonex
If you forget to use your nasal spray at the right time, use it as soon as you remember, and then follow your normal routine. Do not use a double dose to make up for forgotten doses.
If you stop using Nasonex
In some patients, Nasonex may start to relieve symptoms 12 hours after the first dose; however, it may take two days for the full benefit of treatment to be seen. It is very important that you use your nasal spray regularly. Do not stop treatment even if you feel better, unless your doctor tells you to.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Immediate allergic reactions (hypersensitivity) can occur after using this medicine. These reactions can be serious. You should stop using Nasonex and seek medical help immediately if you experience symptoms such as:
If corticosteroid nasal sprays are used at high doses for long periods of time, side effects can occur due to the medicine being absorbed into the body.
Other side effects
Most people do not have any problems after using the nasal spray. However, some people after using Nasonex or other corticosteroid nasal sprays may experience:
Common side effects (may affect up to 1 in 10 people)
Frequency not known (cannot be estimated from the available data)
Reporting of side effects:
If you experience any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Spanish Medicines Surveillance System for Human Use: https://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medicine.
Medicines should not be disposed of via wastewater or household waste. Dispose of the packaging and any unused medicine in the SIGRE collection point at your pharmacy. If you are unsure, ask your pharmacist how to dispose of the packaging and any unused medicine. This will help protect the environment.
What is in Nasonex
Appearance and packaging
Nasonex is a nasal spray suspension.
Each bottle contains 60 or 140 sprays.
Bottles containing 60 sprays are presented in individual packs.
Bottles containing 140 sprays are presented in packs of 1, 2, or 3 bottles.
Not all pack sizes may be marketed.
Marketing authorisation holder and manufacturer
Marketing authorisation holder Organon Health, S.L. Paseo de la Castellana, 77 28046 Madrid Spain Tel.: 915911279 | Manufacturer Organon Heist bv Industriepark 30 2220 Heist-op-den-Berg Belgium |
This medicine is authorised in the Member States of the European Economic Area under the following names:
Austria: Nasonex aquosum – Nasenspray
Belgium, Croatia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Slovenia, Sweden, United Kingdom: Nasonex
Bulgaria, Czech Republic, Romania, Slovakia: NASONEX
Latvia: Nasonex 50 mikrogrami/deva deguna aerosols, suspensija
Portugal: Nasomet
Spain: NASONEX 50 micrograms nasal spray suspension
Date of last revision of this leaflet:03/2020
Detailed and up-to-date information on this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) http://www.aemps.gob.es/
The average price of NASONEX 50 micrograms nasal spray suspension in October, 2025 is around 8.99 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.