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Montelukast
Pronounced mon-te-LOO-kast
Brand names: Singulair
Type: Leukotriene blocker · All Lung & Breathing Medicines
What Montelukast is used for
- Asthma maintenance
- Seasonal and year-round allergies
- Preventing exercise-induced asthma
Common side effects
- Headache
- Stomach pain
- Tiredness
- Cold-like symptoms
Important cautions
- Carries a boxed warning for serious behavior and mood changes, including agitation, depression, and suicidal thoughts — stop and contact the care team if these appear
- It is not a rescue treatment for an asthma attack
How it comes
Tablets, chewable tablets, granules. This guide lists forms only — it never lists strengths or doses.
Related medicines — Lung & Breathing Medicines
Condition guides on MedicalVideos.com
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.