Dulera Inhaler (Mometasone / Formoterol)

Also Known as Zenhale

Prescription medicineOnly Available By Prescription

Top brand choice

Strength Pack Size Qty
Strength
100mcg/5mcg (120 doses/inhaler)
Pack Size
Qty
Strength
200mcg/5mcg (120 doses/inhaler)
Pack Size
Qty

Top Generic choice

Strength Pack Size Qty
Strength
200mcg/6mcg (120 doses/inhaler)
Pack Size
Qty
What if I find a lower price with another pharmacy?

We guarantee the lowest price on all of our prescription products. If you find your medications cheaper at any other recognized licensed mail order pharmacy, we will not only match their price, we will beat it by 25% of the difference. It is our 125% price match guarantee!

Example: If you find a product on Canada Drugs Direct for $50.00 and find the same product for $40.00 at another mail order pharmacy, we will provide you with a $12.50 discount, bringing your total to $37.50.

To get the discount please make sure to mention the price match to the customer service team when they call to collect payment for your order. Or call toll free at 1-888-904-8467 to place the order through the phone.

Terms & Conditions of Program

  • Guaranteed lowest price is only valid at the time of sale.
  • We will only match the current advertised price.
  • Products must be identical and in stock at the time of placing an order with a licensed mail order pharmacy. They must be an online Canadian pharmacy with an address in Canada.
  • Products must be authentic in brand and size (same manufacturer, same country of manufacture, same pack size, same strength and same quantity).
  • Products must be new. We cannot match the price of any used, short expiry or expired product.
  • Price match can only be issued over the phone with our customer service team. Please note at this time we cannot offer price matching for the products Ozempic or Saxenda.
What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

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.

Fact Table

Formula

Mometasone: C22H28Cl2O4, Formoterol: C19H24N2O4

License

FDA approved

Bioavailability

Mometasone: Not applicable (locally acting), Formoterol: 61-64% (inhalation)

Legal status

Prescription only

Chemical Name

Mometasone / Formoterol

Elimination half-life

Mometasone: Not applicable (locally acting), Formoterol: Approximately 10 hours

Dosage (Strength)

Available as a metered-dose inhaler in two strengths: 100/5 mcg and 200/5 mcg per actuation

Pregnancy advice

Category C (Risk not ruled out). Should only be used if the potential benefit justifies the potential risk to the fetus. Consult a healthcare provider.

Brands

Dulera (USA), Zenhale (Canada)

Protein binding

Mometasone: >98%, Formoterol: 61-64%

PubChem CID

Mometasone: 441336, Formoterol: 3083541

MedlinePlus

a609018

ChEBI

Mometasone: CHEBI:6888, Formoterol: CHEBI:42793

ATC code

R03AK07

DrugBank

Mometasone: DB00764, Formoterol: DB00983

KEGG

Mometasone: D00690, Formoterol: D07973

Routes of administration

Inhalation

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.



IMPORTANT NOTE: The information provided above is for general awareness and educational purposes only. It is not intended to diagnose, treat, or replace professional medical or veterinary advice. Always consult your physician, pharmacist, or veterinarian regarding the safety, suitability, and proper use of any medication for yourself or your pet.

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