Montelukast
Singulair (montelukast) is a prescription leukotriene receptor antagonist used to prevent asthma attacks and relieve symptoms of seasonal allergies. It works by blocking inflammatory substances called leukotrienes that cause airway narrowing and swelling.
Singulair is a daily asthma and allergy prevention medication that blocks inflammatory leukotrienes to keep airways open.
Key facts at a glance
- RxNorm
- 153889
- Generic
- Singulair
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Prevention and chronic treatment of asthma in adults and children; relief of seasonal and perennial allergic rhinitis symptoms; prevention of exercise-induced bronchoconstriction.
Blocks cysteinyl leukotriene receptors (CysLT1), preventing leukotriene-induced bronchoconstriction, inflammation, and mucus production in the airways.
Not for acute asthma attacks; taken once daily for maintenance; FDA warning exists for potential neuropsychiatric effects including mood changes; available as tablets, chewable tablets, and oral granules.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy