Singulair (Montelukast)

Name: Singulair
Brand: Merck
SKU: 2055
Availability: InStock

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

Type:

Product: Singulair Tablet

Manufacturer: Merck

Country: Turkey

Dosage: 10 mg

Qty-Price (USD):

Generic Equivalent of Singulair

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

Type:

Product: Montelukast Oral Granules

Manufacturer: Generic

Country: Canada

Dosage: 4 mg

Qty-Price (USD):

Type:

Product: Montelukast Tablet Chewable

Manufacturer: Generic

Country: United Kingdom

Dosage: 4 mg

Qty-Price (USD):

Type:

Product: Montelukast Tablet Chewable

Manufacturer: Generic

Country: United Kingdom

Dosage: 5 mg

Qty-Price (USD):

Type:

Product: Montelukast Tablet

Manufacturer: Generic

Country: Canada

Dosage: 10 mg

Qty-Price (USD):

Type:

Product: Montelukast Tablet

Manufacturer: Generic

Country: United Kingdom

Dosage: 10 mg

Qty-Price (USD):

Singulair Information

medically reviewed by Carol Hou (BSc. Pharm) on August 15, 2025.

A licensed pharmacist (Licensed Community Pharmacies Directory | College of Pharmacists of British Columbia) with over 20 years of experience in medication management, specifically medication safety, she has reviewed the information for accuracy and completeness.

Singulair and Montelukast at CanadaPharmacyOnline.com

The brand name Singulair, manufactured by Merck, is available in Turkey.

Generic montelukast is sourced from manufacturers that meet applicable regulatory standards. The specific manufacturer of your dispensed medication may vary.

Important Information about Generic Montelukast:

Generic montelukast contains the same active ingredient as brand-name Singulair and is required to meet the same safety, effectiveness, and quality standards. This means it is designed to work in the same way as Singulair. Studies have shown that generic montelukast is bioequivalent to brand-name Singulair, meaning they have similar absorption rates and reach similar concentrations in the bloodstream. However, individual responses to medication can vary due to factors such as metabolism, genetics, and other health conditions.

For more information about generic drug approval and bioequivalence, you can visit the FDA website: https://www.fda.gov/drugs/generic-drugs/generic-drug-facts.

Dosage:

The brand name Singulair is available in 10 mg oral tablets.

The generic Montelukast is available in different strengths and forms (at this pharmacy), including those listed below. Availability may vary depending on the manufacturer and market.
• 4 mg in Oral Granules and Chewable Tablets
• 5 mg Chewable Tablets
• 10 mg Oral Tablets

Your doctor will determine the appropriate dose based on your individual needs and medical conditions.

Usage:

Singulair (montelukast) is a medication that helps control chronic respiratory and allergy issues in adults and children as young as 12 months. It is primarily used for long-term asthma management, but it is important to remember that it does not treat sudden asthma attacks. It also helps prevent exercise-induced breathing problems and alleviates symptoms of seasonal and year-round allergies, such as sneezing and a runny nose.

Mechanism of Action:
Singulair (montelukast) works by blocking specific inflammatory chemicals in the body called leukotrienes. These leukotrienes typically attach to receptors in your airways and nose, causing symptoms like tightened breathing passages, swelling, and increased mucus. As a leukotriene receptor antagonist, Singulair acts like a "shield," attaching to these receptors itself and preventing the leukotrienes from causing these effects. This helps decrease airway narrowing and inflammation, making breathing easier and reducing allergy symptoms.

Take Singulair exactly as your doctor prescribes, following the instructions in the product monograph in Canada. Consult your doctor for personalized guidance and safe use.

The information below summarizes some, but not all, potential side effects, risks, and interactions. Before taking Singulair, it is essential to discuss all possible side effects, risks, and interactions with your doctor or pharmacist.

Side Effects:

The information below outlines potential side effects of Singulair (montelukast). It is not an exhaustive list, and individual reactions can vary.

Common side effects – These are some common side effects of Singulair, but others are possible. Contact your doctor promptly if any side effects are persistent, worsening, or concerning, or if you experience any other concerning symptoms.
• Abdominal pain
• Cough
• Diarrhea
• Earache or ear infection
• Fever
• Headache
• Runny or stuffy nose
• Sore throat
• Upper respiratory infection

Other Potential Side Effects (less common):
• Agitation (including aggressive behavior or hostility)
• Anxiety
• Attention problems
• Bad or vivid dreams
• Confusion or disorientation
• Depression
• Dizziness
• Drowsiness
• Dry mouth
• Hives (urticaria)
• Insomnia (trouble sleeping)
• Irritability
• Joint pain
• Memory problems
• Muscle cramps
• Nausea
• Nightmares
• Obsessive-compulsive symptoms
• Restlessness
• Rash
• Sleepwalking
• Stuttering
• Thirst
• Tingling or numbness (paresthesia/hypoesthesia)
• Tremor
• Uncontrolled muscle movements
• Vomiting

Serious Side Effects: These are rare but potentially severe side effects. Seek immediate medical attention or call emergency services if you experience any of the following:
• Allergic reactions (e.g., severe rash, hives, swelling of the face, lips, tongue, or throat, difficulty breathing, anaphylaxis)
• Behavior or mood changes (severe, including suicidal thoughts and actions, hallucinations) - This is a Boxed Warning for Singulair. If these occur, stop the medication and seek medical attention immediately.
• Churg-Strauss syndrome (a rare, serious condition involving blood vessel inflammation with symptoms like flu-like illness, worsening asthma, rash, and numbness/tingling in limbs)
• Liver problems (signs include yellowing of the skin or eyes, dark urine, abdominal pain, unusual fatigue)
• Seizures
• Severe skin reactions (e.g., blistering, peeling, red or purple rash spreading across the body)

Contraindications:

The following is not an exhaustive list of contraindications. Before starting Singulair, it is crucial to discuss all your medical conditions, past and present, and all medications you are taking with your doctor or pharmacist.

Singulair should not be used if you:
• You have a known hypersensitivity or allergy to montelukast or its ingredients.
• You have phenylketonuria (PKU) and are prescribed the chewable tablets, as they contain phenylalanine.

Drug Interactions:

Before taking Singulair, it is essential to discuss all potential risks and interactions with your doctor or pharmacist. For complete and up-to-date information, please visit the consumer information | Organon.com: https://www.organon.com/canada-en/wp-content/uploads/sites/5/2021/05/SINGULAIR-CI_E.pdf.

Provide your doctor with a complete list of all your medications, including prescriptions, over-the-counter (OTC) drugs, vitamins, herbal supplements, recreational drugs, or significant dietary changes, as these potentially interact with Singulair. Singulair may interact with other medicines, but is not limited to:
• Enzyme Inducers (decrease montelukast levels): These medications can speed up the breakdown of montelukast in the body, potentially making it less effective. Your doctor might need to monitor your response or adjust your Singulair dose. Examples include:
o Carbamazepine (Tegretol, an anti-seizure medication)
o Phenobarbital (an anti-seizure medication)
o Phenytoin (Dilantin, an anti-seizure medication)
o Rifampin (an antibiotic used to treat tuberculosis)
o St. John's Wort (an herbal supplement)
• Enzyme Inhibitors (increase montelukast levels): While less commonly reported as clinically significant, some medications that inhibit the enzymes that break down montelukast could theoretically increase its levels in the body. Cannabis/Cannabidiol (CBD): Some reports suggest that cannabis and CBD can increase montelukast levels in the body, potentially increasing the risk of side effects. Gemfibrozil (Lopid, a cholesterol-lowering medication) significantly increases montelukast levels. If you take both, your doctor may need to monitor you more closely.
• Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) like aspirin or ibuprofen: For most people, it's safe to take NSAIDs with montelukast. However, if you have aspirin-exacerbated respiratory disease (AERD) or if NSAIDs are known to worsen your asthma, you should continue to avoid them, even while taking Singulair.
• Warfarin (blood thinner): Although not always a reason to avoid co-administration, some studies have shown that montelukast can make warfarin less effective by affecting its metabolism. If you take warfarin, your doctor may monitor your blood clotting levels more frequently and adjust your dose as needed.

Alcohol:
While there isn't a direct chemical interaction, both montelukast and alcohol can cause dizziness or drowsiness. Combining them might worsen these effects. Additionally, rare cases of liver damage have been reported with montelukast, and alcohol can also affect the liver, so caution is advised.

Pregnancy and Breastfeeding:

Singulair (montelukast) during pregnancy is generally considered safe to use if it's needed to keep asthma under control, as uncontrolled asthma can pose a greater risk. Studies haven't shown an increased chance of significant birth defects. For breastfeeding, Singulair does pass into breast milk, but in minimal amounts, and no harmful effects have been seen in breastfed babies. However, it's always best to talk with your doctor if you're pregnant or breastfeeding to make sure Singulair is the right choice for you and your baby.

Use in Children:

Singulair (montelukast) is approved for use in children for various conditions, with specific dosages and formulations based on age. It can be used for long-term asthma management in children as young as 12 months, for seasonal allergies starting at 2 years, for year-round allergies from 6 months, and to prevent exercise-induced breathing issues in children six and older. Parents and caregivers must be aware of potential neuropsychiatric side effects in children, such as mood or behavior changes, and discuss any concerns promptly with their child's doctor.

Frequently Asked Questions about Singulair at Canada Pharmacy Online:

Why is Singulair more affordable in Canada than in the United States?

Prescription drug prices, including Singulair, are generally lower in Canada than in the US due to a combination of factors, primarily government price regulations, differing market dynamics, and other economic considerations. In Canada, provincial and federal governments negotiate drug prices with pharmaceutical companies, which often results in lower costs compared to the U.S., where market forces play a more significant role. For more information, see the FAQs on Prescription Drug Importation from the Kaiser Family Foundation (KFF): https://www.kff.org/health-costs/issue-brief/faqs-on-prescription-drug-importation/

What is the difference between Pradaxa 110 mg and 150 mg?

The difference in dosage represents the different amounts of the same active ingredient (dabigatran etexilate) present in each capsule.

How much is the shipping?

Our shipping fee is a flat rate of $10.00 per order. Our pharmacy focuses on offering you the lowest prices on high-quality products.

How do I order from your pharmacy?

Ordering from us is very simple. You can purchase online or call Customer Service at 1866.920.3784; for more information or to learn about the ordering process, visit our How to Order page.

Is there a limit on how many Singulair tablets I am allowed to order at one time?

CanadaPharmacyOnline.com can only dispense a maximum of a three-month supply of Singulair at once, as per your doctor's prescription.

Can I buy Singulair over the counter from you?

No, Singulair requires a valid prescription from your doctor. We do not sell this product without a valid prescription.

Do you ship to the United States?

Yes, we do. It usually takes 7 to 18 business days to receive your order from our pharmacy.

Is there a generic for Singulair?

Yes, there is a generic alternative for this product, called Montelukast.

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The information on this page is sourced from independent third parties contracted by CanadaPharmacyOnline. While we cannot guarantee its medical accuracy, we strongly recommend consulting a healthcare professional for personalized advice regarding medications or medical conditions.

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