Medically reviewed by Austin Ulrich, PharmD
Key Takeaways
- Montelukast is FDA-approved to prevent exercise-induced bronchoconstriction (EIB), which is common in people with asthma, when taken at least two hours before physical activity.
- Unlike rescue inhalers, this medication works by blocking leukotrienes—chemicals that cause your airways to tighten during exertion.
- Choosing the generic version of this medication is a reliable way to reduce your monthly costs while maintaining an active lifestyle.
Understanding Montelukast (Singulair)
Montelukast is a prescription oral medication used to manage asthma and seasonal allergies. It belongs to a class of medications called leukotriene receptor antagonists. The brand-name version of this drug is known as Singulair. While both contain the same active ingredient, the generic version is typically much more affordable.
Exercise-induced bronchoconstriction (EIB) can be a significant barrier to staying fit and can adversely affect health. If you find yourself wheezing or coughing during a run, and you’re diagnosed with EIB, montelukast is one option that can help you breathe easier. Knowing when to take your dose ensures the medication is at peak levels in your system exactly when your lungs need it most.
What is Exercise-Induced Bronchoconstriction (EIB)?
Sometimes referred to as exercise-induced asthma, EIB occurs when the airways in the lungs narrow during or after physical exertion. It can happen whether you have asthma or not. Symptoms include shortness of breath, wheezing, and chest tightness. For many, cold or dry air acts as a secondary trigger, making outdoor activities particularly challenging. Montelukast is specifically designed to target a chemical pathway that leads to this narrowing.
How Montelukast Stops Attacks Before They Start
When you exercise, your body may release leukotrienes—inflammatory chemicals that cause the muscles around your airways to swell and tighten. Montelukast works by blocking the receptors where these chemicals would normally attach. By blocking these signals, the medication prevents the inflammatory response from starting, keeping your airways open even during intense cardio or weightlifting. Montelukast is FDA approved as a treatment for EIB.
The Two-Hour Rule for Exercise
Timing is everything when using montelukast for exercise. A healthcare professional will typically recommend taking one tablet at least two hours before you begin your workout. It takes this long for the medication to be absorbed into your bloodstream and reach a concentration high enough to block leukotrienes effectively. Taking it right as you start your run will likely not provide the protection you need.
Montelukast vs. Rescue Inhalers
It is important to distinguish montelukast from “rescue” medications like albuterol. Montelukast is a preventive treatment; it is not designed to stop an asthma attack that has already begun. If you experience sudden, acute shortness of breath while exercising, you should still rely on your quick-relief inhaler as directed by a healthcare professional. Montelukast works by preventing the airway narrowing, and consistent use, along with regular exercise, reduces the frequency and severity of these episodes over time.
How to Save on Your Prescriptions
For those managing chronic respiratory issues such as EIB, the cost of daily medication can add up quickly. Asking for generic montelukast instead of the brand-name Singulair is one way to lower your out-of-pocket expenses.
We are on your side when it comes to navigating these costs. You can save up to 85% on your prescription costs. Compare pricing and get verified discounts at over 74,000 trusted pharmacies to ensure you have the tools you need to stay active without the financial burden.
Brand vs. Generic Price Comparison
The following table shows the estimated price difference between brand-name and generic montelukast when using a Super+ RX discount coupon.
| Medication Name | Estimated Average Retail Price | Estimated Super+ RX Member Price |
| Montelukast (Generic) | ~$25.00 – $45.00 | ~$4.00 – $20.00 |
| Singulair (Brand) | ~$430.00 – $560.00 | ~$230.00 – $290.00 |
Your Savings Roadmap
- Search: Visit super.com/rx and enter “Montelukast” into the search bar.
- Compare: Check the prices at local pharmacies to see where the discount is highest.
- Claim: Get your Super+ RX discount coupon delivered directly to your phone.
- Present: Show the coupon to your pharmacist to secure your member-only pricing.
Frequently Asked Questions
Can I take an extra dose of montelukast before a marathon?
No. You should never take more than one dose of montelukast in a 24-hour period. If you already take a daily dose in the evening for asthma or allergies, you should not take an additional dose before exercise, including a marathon. Consult a healthcare professional about adjusting your daily timing instead.
How long does the protection last?
A single dose of montelukast taken before exercise is thought to provide protection against bronchoconstriction for up to 24 hours. This makes it a convenient option for athletes who EIB and have long training sessions or multiple workouts in a single day.
Does montelukast cause mood changes?
The FDA has issued a “boxed warning” for montelukast regarding serious mental health side effects, including agitation, aggression, and sleep disturbances. While many people use the medication safely, you should immediately notify a healthcare professional if you notice any changes in mood or behavior.
Is montelukast safe for children who play sports?
Montelukast is frequently prescribed for children and adolescents with asthma (ages 12 and older), EIB (ages 6 and older), and/or seasonal allergies (ages 2 and older). However, the dosage amounts vary by age (chewable tablets may be helpful for children who have trouble swallowing tablets whole). Always follow the specific instructions provided by a healthcare professional for pediatric use.
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References
Goldin J, Bruner PJ. Exercise-Induced Bronchoconstriction. StatPearls. June 2, 2025. Accessed April 23, 2026. https://www.ncbi.nlm.nih.gov/books/NBK557554/
Montelukast. Prescribing information. RemedyRepack Inc.; 2025. Accessed April 23, 2026. https://nctr-crs.fda.gov/fdalabel/services/spl/set-ids/ecaa9b4b-5941-4af5-930c-35e9f3b2b4ba/spl-doc
Wermuth HR, Badri T, Takov V. Montelukast. StatPearls. March 22, 2023. Accessed April 23, 2026. https://www.ncbi.nlm.nih.gov/books/NBK459301/
Disclaimer:
Generative AI was used in the development of this content. All information in this article has been reviewed by our highly-trained clinicians. We do not provide medical advice. Please, consult a physician.
