What Nasonex is & what it is used for What is Nasonex? Nasonex Nasal Spray contains mometasone furoate, one of a group of medicines called corticosteroids. When mometasone furoate is sprayed into the nose, it can help to relieve inflammation (swelling & irritation of the nose), sneezing, itching & a blocked up or runny nose. What is Nasonex used for? Hay fever & perennial rhinitis Nasonex is used to treat the symptoms of hay fever (also called seasonal allergic rhinitis) & perennial rhinitis in adults & children aged 3 & older. Hay fever, which occurs at certain times of the year, is an allergic reaction caused by breathing in pollen from trees, grasses, weeds & also moulds & fungal spores. Perennial rhinitis occurs throughout the year & symptoms can be caused by a sensitivity to a variety of things including house dust mite, animal hair (or dander), feathers & certain foods. Nasonex reduces the swelling & irritation in your nose & thereby relieving sneezing, itching & a blocked-up or runny nose caused by hay fever or perennial rhinitis. Nasal polyps Nasonex is used to treat nasal polyps in adults aged 18 & over. Nasal polyps are small growths on the lining of the nose & usually affect both nostrils. Nasonex reduces the inflammation in the nose, causing the polyps to gradually shrink, thereby relieving a blocked feeling in the nose which may affect breathing through the nose. What you need to know before you use Nasonex Do not use Nasonex if you are allergic (hypersensitive) to mometasone furoate or any of the other ingredients of this medicine (listed in section 6). if you have an untreated infection in your nose. Use of Nasonex during an untreated infection in your nose, such as herpes, can worsen the infection. You should wait until the infection is resolved before you start using the nasal spray. if you have recently had an operation on your nose or you have injured your nose. You should not use the nasal spray until your nose has healed. Warnings & precautions Talk to your doctor or pharmacist before using Nasonex if you have or have ever had tuberculosis. if you have any other infection. if you are taking other corticosteroid medicines, either by mouth or by injection. if you have cystic fibrosis. While you are using Nasonex, talk to your doctor if your immune system is not functioning well (if you have difficulty in fighting infection) & you come into contact with anyone with measles or chickenpox. You should avoid coming into contact with anyone who has these infections. if you have an infection of the nose or throat. if you are using the medicine for several months or longer. if you have persistent irritation to the nose or throat. When corticosteroid nasal sprays are used at high doses for long periods of time, side effects may occur due to the drug being absorbed in the body. If your eyes are itching or irritated, your doctor may recommend that you use other treatments with Nasonex. Contact 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 may cause certain side-effects, such as slowed growth rate in children. It is recommended that the height of children receiving long-term treatment with nasal corticosteroids is regularly monitored & if any changes are noted, their doctor should be notified. Other medicines & Nasonex Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, including medicines obtained without a prescription. If you are taking other corticosteroid medicines for allergy, either by mouth or injection, your doctor may advise you to stop taking them once you begin using Nasonex. A few people may find that once they discontinue oral or injected corticosteroids they suffer from some undesirable effects, such as joint or muscular pain, weakness & depression. You may also seem to develop other allergies, such as itchy, watering eyes or patches of red & itchy skin. If you develop any of these effects, you should contact your doctor. Some medicines may increase the effects of Nasonex & your doctor may wish to monitor you carefully if you are taking these medicines (including some medicines for HIV: ritonavir, cobicistat). Pregnancy & breast-feeding There is little or no information on the use of Nasonex in pregnant women. It is not known if mometasone furoate is found in breast milk. If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine. Driving & using machines There is no known information on the effect of Nasonex on the ability to drive or use machinery. Nasonex contains benzalkonium chloride Benzalkonium chloride may cause irritation or swelling inside the nose, especially if used for a long time.