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SIDE EFFECTS: See also Precautions.Headache, sore throat, blood-tinged mucus/phlegm, burning/irritation/dryness of the nose, and nosebleeds may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor immediately if any of these unlikely but serious side effects occur: pain in your nose, repeated nosebleeds, whistling sound while breathing, vision changes, white patches in your nose/mouth, painful/trouble swallowing.A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using mometasone, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies.Before using this medication, tell your doctor or pharmacist your medical history, especially of: tuberculosis, untreated infections, herpes eye infection, recent nose problems (e.g., nasal septum ulcers/surgery/trauma), certain eye conditions (cataracts, glaucoma).Avoid exposure to chickenpox or measles infection while using this medication and other corticosteroids. If you are exposed to these infections, seek immediate medical attention.Though very unlikely, it is possible this medication will be absorbed into your bloodstream. This may have undesirable consequences that may require additional corticosteroid treatment. This is especially true for children and for those who have used this drug for an extended period of time and if they also have serious medical problems such as serious infections, injuries or surgeries. This precaution applies for up to one year after stopping use of this drug. Tell your doctor immediately if any of the following side effects occur: vision problems, persistent headache, increased thirst or urination, unusual weakness or weight loss, dizziness. Consult your doctor or pharmacist for more details, and inform them that you use (or have used) this medication.Caution is advised when using this drug in children. Though it is unlikely to occur with intranasal steroids (mometasone), this medication may temporarily slow down a child's rate of growth, but it will probably not affect final adult height. Monitor your child's height periodically.This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor.It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.

Report Problems to the Food and Drug Administration   You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.