Brand Name(s):

  • Asmanex®
  • Dulera®(as a combination product containing Formoterol, Mometasone)

WHY is this medicine prescribed?

Mometasone inhalation is used to prevent difficulty breathing, chest tightness, wheezing, and coughing caused by asthma. Mometasone inhalation is not used to treat an asthma attack (sudden episode of shortness of breath, wheezing, and coughing) that has already started. Mometasone is in a class of medications called corticosteroids. It works by decreasing swelling and irritation in the airways to allow for easier breathing.

HOW should this medicine be used?

Mometasone inhalation comes as a powder to inhale by mouth. It is usually inhaled twice daily or once a day in the evening. Use mometasone inhalation at around the same time(s) every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use mometasone inhalation exactly as directed. Do not inhale more or less of it or inhale it more often than prescribed by your doctor.

Talk to your doctor about how you should use your other oral and inhaled medications for asthma during your treatment with mometasone inhalation. If you were taking an oral steroid such as dexamethasone, methylprednisolone (Medrol), or prednisone, your doctor may want to gradually decrease your steroid dose starting at least 1 week after you begin to use mometasone inhalation. Special care will be needed in certain situations for several months as your body adjusts to the change in medication. Ask your doctor for more information.

Mometasone inhalation helps to prevent asthma attacks but will not stop an asthma attack that has already started. Do not use mometasone inhalation during an asthma attack. Your doctor will prescribe a short-acting inhaler to use during asthma attacks.

Your doctor will probably start you on an average dose of mometasone inhalation. Your doctor may decrease your dose if your symptoms are controlled or gradually increase your dose if your symptoms have not improved after 2 weeks.

Mometasone inhalation controls asthma but does not cure it. It may take 1 to 2 weeks or longer before you feel the full benefit of the medication. Continue to use mometasone inhalation even if you feel well. Do not stop using mometasone inhalation without talking to your doctor.

Tell your doctor if your asthma worsens during your treatment. Call your doctor immediately if you have an asthma attack that does not stop when you use your fast-acting asthma medication, or if you need to use more of your fast-acting medication than usual.

Before you use your mometasone oral inhaler the first time, read the written instructions that come with it. Look at the diagrams carefully and be sure that you recognize all the parts of the inhaler. Ask your doctor, pharmacist, or respiratory therapist to show you how to use it. Practice using the inhaler while he or she watches.

The dose counter on the base of your mometasone inhaler tells you how many doses of medication are left in your inhaler. Read the numbers on the dose counter from top to bottom. The number on the dose counter decreases every time you lift the cap to load a dose of medication and will read ''01'' just before you use your last dose of medication. Do not use the inhaler if the numbers on the dose counter do not change after you load a dose. Call your pharmacist if your inhaler is not working properly.

Throw away the inhaler after you use the last dose or 45 days after you removed it from the package, whichever is sooner.

To use the inhaler, follow these steps:

  • If you are using a new inhaler for the first time, remove it from the foil pouch. Write the date that you opened the inhaler in the space provided on the cap label.
  • Hold the inhaler straight up with the colored base on the bottom. Twist the white cap counterclockwise and remove it. This loads the correct amount of medication in the base of the inhaler, so it is important to twist the cap and not twist the base with your hand. As you lift the cap off, the dose counter on the base will count down by one to show the number of doses left after this use.
  • Breathe out fully.
  • Hold the inhaler on its side with the mouthpiece facing you. Be sure that you are not covering the ventilation holes on the sides of the inhaler. Place the mouthpiece of the inhaler in your mouth and close your lips firmly around it.
  • Breathe in a fast, deep breath. You will receive your medication as a very fine powder, so you may not be able to smell, feel, or taste it as you inhale.
  • Remove the inhaler from your mouth and hold your breath for 10 seconds or as long as you comfortably can. Do not breathe out into the inhaler.
  • Wipe the mouthpiece dry. Put the cap back onto the inhaler so that the indented arrow is in line with the dose counter. Gently press down and turn clockwise until you hear a click.
  • Rinse your mouth with water.

If your inhaler needs to be cleaned, gently wipe it with a dry cloth. Do not wash the inhaler. Keep the inhaler away from water or other liquids.

Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient.

Are there OTHER USES for this medicine?

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

What SPECIAL PRECAUTIONS should I follow?

Before using mometasone oral inhalation,

  • tell your doctor and pharmacist if you are allergic to mometasone or any other medications.
  • tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements and herbal products you are taking or plan to take. Be sure to mention ketoconazole (Nizoral). Also tell your doctor if you are taking corticosteroids or medications for seizures, or if you have taken these medications in the past. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
  • tell your doctor if you or anyone in your family has or has ever had osteoporosis (a condition in which the bones become thin and weak and break easily) and if you have or have ever had tuberculosis (a type of infection) in your lungs, cataracts (clouding of the lens of the eye), glaucoma (an eye disease) or high pressure in the eye, or liver disease. Also tell your doctor if you have any type of untreated infection anywhere in your body or a herpes infection (a type of infection that causes a sore on the eyelid or eye surface) in your eye, or if you are on bedrest or unable to move around.
  • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while using mometasone inhalation, call your doctor.
  • if you are having surgery, including dental surgery, tell the doctor or dentist that you are using mometasone inhalation.
  • you should know that your body may be less able to cope with stress such as surgery, illness, severe asthma attack, or injury. Call your doctor right away if you get sick and be sure that all healthcare providers who treat you know that you are using mometasone inhalation.
  • tell your doctor if you have never had chickenpox or measles and you have not been vaccinated against these infections. Stay away from people who are sick, especially people who have chickenpox or measles. If you are exposed to one of these infections or if you develop symptoms of one of these infections, call your doctor right away. You may need treatment to protect you from these infections.
  • you should know that mometasone inhalation sometimes causes wheezing and difficulty breathing immediately after it is inhaled. If this happens, use your fast-acting (rescue) asthma medication right away and call your doctor. Do not use mometasone inhalation again unless your doctor tells you that you should.

What SPECIAL DIETARY instructions should I follow?

Unless your doctor tells you otherwise, continue your normal diet.

What should I do IF I FORGET to take a dose?

Use the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not inhale a double dose to make up for a missed one.

What SIDE EFFECTS can this medicine cause?

Mometasone inhalation may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • headache
  • bone, muscle, joint, or back pain
  • heartburn
  • loss of appetite
  • stomach pain
  • vomiting
  • nose irritation or nosebleed
  • dry throat
  • difficult, frequent, or painful urination
  • painful menstrual periods

Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately:

  • hives
  • swelling of the eyes, face, tongue, throat, arms, hands, feet, ankles, or lower legs
  • hoarseness
  • difficulty breathing or swallowing
  • throat tightness
  • extreme tiredness
  • muscle weakness
  • weight gain in the upper body, neck, and face
  • thinning arms and legs
  • fragile skin that bruises easily
  • excess hair growth
  • irregular or missed menstrual periods
  • decreased sexual desire
  • irritability
  • anxiety
  • depression
  • vision changes
  • painful white patches in the mouth or throat

Mometasone inhalation may cause slowed growth in children. Your child's doctor will monitor your child's growth carefully while he or she is using mometasone inhalation. Talk to your doctor about the risks of giving this medication to your child.

Mometasone inhalation may cause a decrease in your bone mineral density (bone strength and thickness). Talk to your doctor about the risks of using mometasone inhalation.

Mometasone inhalation may cause other side effects. Call your doctor if you have any unusual problems while using this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at Web Site] or by phone [1-800-332-1088].

What should I know about STORAGE and DISPOSAL of this medication?

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away your inhaler 45 days after you open the package and throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

What should I do in case of OVERDOSE?

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

Symptoms of overdose may include:

  • extreme tiredness
  • muscle weakness
  • weight gain in the upper body, neck, and face
  • thinning arms and legs
  • fragile skin that bruises easily
  • excess hair growth
  • irregular or missed menstrual periods
  • decreased sexual desire
  • irritability
  • anxiety
  • depression

What OTHER INFORMATION should I know?

Keep all appointments with your doctor.

Do not let anyone else use your medication. Ask your pharmacist any questions you have about refilling your prescription.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

AHFS® Consumer Medication Information. © Copyright, The American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.

Last Reviewed: August 1, 2010.