About Singulair
Singulair contains montelukast. Its medication class is leukotriene-receptor antagonist. It may be used for long-term asthma management and selected exercise-related breathing or allergic-rhinitis treatment plans, depending on the exact product, diagnosis and the person’s health profile. It blocks leukotrienes, inflammatory signals that tighten and swell the airways.
Whether Singulair is appropriate depends on the diagnosis, exact product and strength, health history, other medicines and available follow-up. A general guide cannot determine whether this treatment is right for you.
Common uses
Approved or recognized uses may vary by formulation, strength, age and clinical setting. This list is not complete.
- long-term asthma management
- selected exercise-related breathing or allergic-rhinitis treatment plans
How this medication works
This summary explains the mechanism at a general level; it does not provide treatment or dosing instructions.
- It blocks leukotrienes, inflammatory signals that tighten and swell the airways.
- Brand, strength and formulation can change a medication’s use and risk.
Safety
Side effects and safety considerations
Adverse effects vary between people. The label, Canadian product monograph and a pharmacist’s advice remain the product-specific references.
- Mood, sleep or behaviour changes can occur and should be reported promptly. The expected benefit should be weighed carefully, especially for mild allergy symptoms; it is not a rescue inhaler.
- This page does not replace the product monograph, your pharmacist’s advice or a consultation. It provides no personalized dose and does not confirm that a product is available or appropriate.
LASO MD
What a healthcare professional may review
A request for a Singulair prescription or renewal begins with an assessment of the indication, expected benefit, risks and required follow-up.
- The breathing or allergy symptoms, their triggers, frequency and effect on sleep or activity
- Recent inhaler use, technique, adherence and any written asthma or allergy plan
- Smoking or vaping, heart-rhythm history and medicines that may worsen symptoms
- Whether lung testing, oxygen measurement or an in-person chest examination is needed
When to get help quickly
Call 911 for severe trouble breathing, blue or grey lips, inability to speak in full sentences, fainting, confusion, or symptoms that do not respond to the person’s emergency plan.