2. 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 and 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) and 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 and if any changes are noted, their doctor should be notified.
Other medicines and 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 and depression. You may also seem to develop other allergies, such as itchy,
watering eyes or patches of red and itchy skin. If you develop any of these effects, you should contact
your doctor.