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Singulair® is a prescription leukotriene receptor antagonist for asthma control and allergy relief. This guide explains how it works, who it may suit, and how to use it safely. US delivery from Canada is available, including options for montelukast without insurance.

What Singulair Is and How It Works

YouDrugstore is a licensed Canadian pharmacy in Manitoba. Pharmacists review prescriptions before dispensing.

This medicine blocks leukotrienes, inflammatory chemicals that tighten airway muscles and trigger swelling. By reducing leukotriene activity, it can help limit wheeze, cough, night symptoms, and nasal congestion. It is used for long-term asthma management and for seasonal or perennial allergic rhinitis. It does not replace a rescue inhaler for sudden breathing symptoms.

Many people use this treatment alongside inhaled therapies. If your condition includes hay fever, symptom relief may extend to sneezing, itchy eyes, and runny nose. Learn more about related conditions in our resources on Allergic Rhinitis and Asthma.

Who It’s For

This therapy is indicated for the prevention and chronic treatment of asthma in adults and children, and for relief of allergy symptoms due to seasonal and perennial allergens. It may also help prevent exercise-induced bronchoconstriction when used as directed by a prescriber. People needing acute symptom relief should use a short-acting rescue inhaler instead.

Avoid use if you have a known hypersensitivity to any component. Those with a history of significant liver disease, neuropsychiatric conditions, or eosinophilic disorders should discuss risks and benefits with a healthcare professional before starting. Always follow your clinician’s guidance.

Dosage and Usage

Take the prescribed strength once daily. For asthma, many prescribers prefer evening dosing; for allergic rhinitis, it may be taken at a convenient time each day. It can be taken with or without food. For exercise-related breathing issues, your clinician may advise a single dose before activity. Do not use it to treat a sudden attack.

Take only one dose per 24 hours unless your prescriber states otherwise. Swallow film-coated tablets whole. Chewables should be thoroughly chewed before swallowing. Oral granules, when prescribed, can be given directly in the mouth or mixed with a small amount of approved soft food; use immediately after opening. Follow the official label for full administration instructions.

Strengths and Forms

Availability may vary by supplier and jurisdiction. Common presentations include:

• Montelukast 10 mg tablets
• 5 mg chewable tablets
• 4 mg chewable tablets
• 4 mg oral granules (single-use packets)

Your prescriber will select a strength suitable for age and indication.

Missed Dose and Timing

If you miss a dose, take the next scheduled dose at the usual time. Do not double up to catch up. For exercise-related use, if a pre-activity dose is missed, do not take extra doses; follow your clinician’s plan for rescue therapy.

Storage and Travel Basics

Store tablets and granules at room temperature in a dry place. Keep in the original packaging until use to protect from moisture. Keep out of reach of children and pets. When you travel, carry your medicine in hand luggage with the pharmacy label. Pack only what you need plus a small reserve. Bring your prescription or a copy of the label for security checks. A pill organizer can help maintain your schedule across time zones. Dispose of opened granule packets that are not used immediately.

Benefits

This therapy can help reduce airway inflammation driven by leukotrienes. Once-daily dosing supports consistent control when taken as prescribed. Chewable forms and granules offer options for children or those who prefer not to swallow tablets. It is not a steroid, and it can be used alongside inhaled controllers or rescue medications as advised.

Side Effects and Safety

• Headache
• Abdominal pain or indigestion
• Throat irritation or cough
• Nasal congestion
• Dizziness or fatigue
• Rash or itch
• Diarrhea or nausea

Serious but uncommon risks include neuropsychiatric events such as agitation, sleep disturbances, depression, or suicidal thoughts and behaviors. Contact a healthcare professional promptly if mood or behavior changes occur. Rarely, hypersensitivity, eosinophilic conditions, or liver-related problems have been reported. This medicine should not be used for sudden breathing symptoms; keep a rescue inhaler available if you have asthma.

Drug Interactions and Cautions

Certain medicines can reduce or increase levels of this treatment. Strong enzyme inducers, such as rifampin, carbamazepine, phenytoin, or phenobarbital, may decrease effectiveness. Some agents, including gemfibrozil, may raise exposure. Always tell your prescriber and pharmacist about all prescription drugs, OTC products, and supplements. Alcohol and other sedatives may worsen dizziness in sensitive individuals.

What to Expect Over Time

With consistent daily use, many people notice steadier breathing control and less nighttime disturbance. Allergy symptom relief may vary by exposure and season. Keep using the medicine as directed even when you feel well, unless your prescriber changes the plan. Track symptoms, triggers, and rescue inhaler use. If control worsens or you need your reliever more often, contact your clinician to reassess treatment.

Compare With Alternatives

If your prescriber recommends the generic, you can Buy montelukast for the same active ingredient. Many patients also use an inhaled corticosteroid for controller therapy. An option is Asmanex®, which provides anti‑inflammatory action via the airways. Your clinician may also recommend a quick‑relief bronchodilator for sudden symptoms. Each option serves a different role; your prescriber will tailor a plan to your needs.

For broader context on airways care, explore What Is Asthma and seasonal allergy tips in Beat Seasonal Allergies. Category overviews such as Respiratory and Exercise-Induced Asthma can also help you review options with your clinician.

Pricing and Access

Check the Singulair price to compare Canadian sourcing with your local options. We highlight total costs clearly at checkout. If you are looking for a Singulair coupon, visit our current offers to see available discounts. You may see additional value through Canadian pricing, with US shipping from Canada for eligible orders.

See limited-time deals on our Promotions page.

Availability and Substitutions

Stock status can change. If an item is unavailable, your prescriber may recommend the generic or another appropriate therapy. You can Order Singulair online when your prescription is ready. Prescription required and verified before dispensing.

Patient Suitability and Cost-Saving Tips

This medicine may suit people with persistent asthma requiring daily control, those with seasonal or perennial allergies, and individuals who experience exercise-triggered symptoms. It is not a substitute for inhaled or oral steroids when those are indicated, and it is not appropriate for emergency relief. People with significant liver disease or prior neuropsychiatric events should discuss suitability carefully.

For savings, consider multi‑month fills when approved by your prescriber. Align refills with other medicines to reduce per‑order fees. Set refill reminders to avoid gaps in therapy. If the generic suits your plan, choosing it can lower your cash-pay outlay while maintaining the same active ingredient.

Questions to Ask Your Clinician

• Role in your plan: controller, allergy relief, or both
• How to pair with your current inhaler regimen
• When to use rescue inhalers during flares
• Signs of side effects that need attention
• Timing for doses across seasons and travel
• Whether a generic option is appropriate

Authoritative Sources

Merck Product Information

FDA DailyMed

Health Canada DPD

Ready to proceed? Start your order for this medicine with prompt shipping, Ships from Canada to US. This information is educational and not a substitute for professional medical advice; always follow your prescriber’s instructions and the official label.