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Dulera (mometasone furoate/formoterol)

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By Editorial Team

2 min read

Reviewed by: HU Medical Review Board | Last reviewed: June 2023 | Last updated: October 2023

Dulera® (mometasone furoate/formoterol) is approved for the long-term treatment of asthma for people 5 years of age and up.1-3

Dulera is a combination of an inhaled corticosteroid and a long-acting beta-agonist (LABA). It comes as a metered-dose inhaler.1-3

Do not take Dulera if you are having an asthma attack. Use a rescue inhaler instead.1-3

What are the ingredients in Dulera?

Dulera contains 2 active ingredients, mometasone furoate and formoterol.1-3

How does Dulera work?

The 2 active ingredients in Dulera work together to treat asthma:1-3

  • Mometasone furoate is a steroid. It works by reducing inflammation in the airways.
  • Formoterol is a LABA. It works by relaxing the muscles around the airways to help open them up.

What are the possible side effects?

The most common side effects of Dulera include:1-3

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  • Allergic reactions
  • Increased wheezing (bronchospasm)
  • Low bone density
  • Slow growth in children
  • Eye problems, such as glaucoma and cataracts
  • Low blood sugar and potassium levels
  • Inflammation of the nose, throat, and sinuses
  • Headache

Inhaled corticosteroids like Dulera can cause thrush. This is a fungal infection in the mouth and throat. Rinse your mouth and regularly clean your inhaler after taking Dulera to help prevent thrush. Contact your doctor if you notice symptoms of thrush, such as:1-3

  • Throat discomfort or pain
  • Hoarse voice
  • Red or white patches in your mouth

Corticosteroids can weaken your immune system and increase your risk of infection. This risk is lower with inhaled corticosteroids. Avoid contact with people who have chickenpox, measles, or other contagious diseases. Call your doctor if you show symptoms of an infection, such as:1-3

  • Fever
  • Fatigue
  • Aches and pains
  • Chills
  • Nausea and vomiting

Dulera can also worsen current infections. Tell your doctor if you have any active infections, including tuberculosis or herpes simplex virus.1-3

These are not all the possible side effects of Dulera. Talk to your doctor about what to expect when taking Dulera. You also should call your doctor if you have any changes that concern you when taking Dulera.

Other things to know

Take Dulera as your doctor describes. It comes as a metered-dose inhaler. Your doctor will teach you how to use, store, and clean your inhaler.1-3

If symptoms do not improve after 2 weeks, your doctor may increase your dosage. Do not stop using Dulera unless your doctor tells you to. If you miss a dose, just take your next scheduled dose when it is due. Do not take Dulera more than twice a day.1-3

Dulera may interfere with other medicines or worsen certain conditions. Tell your doctor if you:1-3

  • Have any heart problems, seizures, high blood pressure, or diabetes
  • Have had any problems with your liver, thyroid, eyes, immune system, or bone health
  • Have any current infections
  • Are planning to have surgery
  • Are pregnant or breastfeeding

Before beginning treatment for asthma, tell your doctor about all your health conditions and any other drugs, vitamins, or supplements you are taking. This includes over-the-counter drugs.

For more information, read the full prescribing information of Dulera.