Dulera Inhaler (Mometasone / Formoterol)

Description

Dulera (Mometasone/Formoterol) is a combination inhaler used to manage and control asthma symptoms. It contains mometasone, a corticosteroid, and formoterol, a long-acting beta-agonist. Mometasone reduces inflammation in the airways, while formoterol helps relax the muscles surrounding them. This dual-action treatment relieves breathing difficulties and prevents wheezing in individuals aged 5 years and older. It is not intended for immediate symptom relief during acute asthma attacks. Instead, it is a long-term solution for reducing asthma symptoms.

Directions

Dulera should be inhaled by mouth. The standard dosage involves taking 2 puffs twice daily, once in the morning and once in the evening. It's important to shake the inhaler well before each use. If the inhaler hasn't been used for more than 5 days, it should be primed by spraying it once away from the face.

After using Dulera, rinse the mouth with water without swallowing to reduce the risk of oral irritation. Always replace the cap after every use. Always follow your healthcare provider’s instructions while using this medication.

Ingredients

Dulera combines two active ingredients: mometasone furoate and formoterol fumarate dihydrate.

Contraindications

Avoid taking or using this product if any of the following apply:

Allergy to formoterol or mometasone

Acute asthma attack or bronchospasm

Cautions

Before using Dulera, you may want to consult a healthcare provider about the following:

Any existing health conditions

Any allergies

A list of all medications you are currently taking

Whether you are pregnant or breastfeeding

Dulera helps manage asthma symptoms over time, but it should not be used during a sudden asthma attack. Use a fast-acting rescue inhaler, like albuterol, for quick relief if you’re having trouble breathing.

Using long-acting beta agonists (LABAs), like formoterol, without a steroid has been linked to severe asthma problems, including death. Dulera is a combination of a LABA and a steroid (mometasone), which reduces this risk when used correctly. Do not use Dulera more often or at higher doses than prescribed, and do not combine it with other medications that contain a LABA.

If you need your rescue inhaler more often, or your symptoms suddenly get worse, talk to your doctor. This could mean your asthma is not well controlled and your treatment plan may need to change.

Dulera may weaken your immune system slightly. This can make infections like chickenpox or measles more dangerous. Also, using Dulera can sometimes lead to a fungal infection in your mouth. To lower the risk, rinse your mouth with water (and spit it out) after each use.

If you’re switching from oral steroids, your body may need time to adjust. During times of stress or illness, you might need additional steroids.

Side Effects

The most common side effects of Dulera include inflammation of the nose or sinuses, upper respiratory infections, flu symptoms, and headaches. These side effects are generally mild and may improve with continued use. If symptoms become bothersome or don’t go away, let your healthcare provider know.

Dulera may also cause more serious side effects, such as thrush (a yeast infection in the mouth or throat), weakened immune response, or adrenal gland problems. Some people may experience allergic reactions, increased wheezing, or unusual heart rhythms—seek medical help if these occur. Long-term use may lead to eye problems, slower growth in children, lower bone density, or changes in blood sugar or potassium levels. Be sure to have regular checkups while using Dulera.

References

Dulera Product Labeling. Whitehouse Station, NJ: Merck & Co., Inc.; 2019.

Dulera Drug Label Information. Jersey City, NJ: Organon LLC; 2025.

About Dr. Gerardo Sison (Page Author)

An honors graduate of the University of Florida, Dr. Sison started his pharmacy career in a community setting, extending his services to hospitals and clinics over time. He has also worked in medication therapy management, advising patients on proper medication use for their chronic health conditions. Read More....