Medically reviewed by Austin Ulrich, PharmD
Key Takeaways
- While antihistamines block histamine, montelukast blocks leukotrienes, which are powerful chemicals that cause significant airway swelling and mucus.
- Montelukast is often superior for individuals who experience “allergic asthma” or chronic congestion that does not improve with standard over-the-counter (OTC) sprays.
- Choosing between these medications often depends on whether you have other symptoms along with allergies, such as asthma or hives, and whether allergy treatments like antihistamines or nasal corticosteroid sprays have been effective.
Why a Pill Instead of a Spray?
If you have visited a healthcare professional for seasonal allergies, you may have walked out with a prescription for montelukast (Singulair) instead of a recommendation for a standard over-the-counter (OTC) antihistamine or nasal spray.
For many, this can be confusing. Why take a prescription “asthma pill” for hay fever? The answer lies in the specific way your body reacts to allergens. While most people associate allergies with histamine, there is another chemical pathway—the leukotriene pathway—that can cause much more severe respiratory symptoms.
Montelukast (Singulair)
Montelukast is a leukotriene receptor antagonist. Unlike Claritin (loratadine) or Zyrtec (cetirizine), which are antihistamines, it does not stop the “itchy/runny” symptoms caused by histamine. Instead, it prevents leukotrienes from attaching to receptors in your lungs and nasal passages.
Why it matters: Leukotrienes are up to 1,000 times more potent than histamine at causing airway constriction and mucus production. For those whose allergies feel like they are “moving into the chest” or causing deep sinus pressure that sprays won’t touch, Montelukast targets the specific source of that inflammation. Allergies are also a common cause of asthma symptoms in people diagnosed with asthma, and montelukast is FDA approved for treating asthma, so it can be an effective medication for those with overlapping allergies and asthma.
| Medication Name | Estimated Average Retail Price | Estimated Super+ RX Member Price |
| Montelukast (Generic) | ~$25.00 – $45.00 | ~$4.00 – $20.00 |
| Singulair (Brand) | ~$420.00 – $560.00 | ~$230.00 – $290.00 |
Antihistamines (Zyrtec, Claritin, Allegra)
Antihistamines are designed to block histamine, the chemical responsible for typical seasonal allergy symptoms (sneezing, watery eyes, and hives).
Why it matters: Antihistamines are excellent for typical allergy symptoms. If your main issue is a tingly nose or itchy eyes, a standard antihistamine is often the first choice. However, antihistamines do very little to stop a late-phase allergic response that leads to severe congestion and asthma-like wheezing or hives.
When is Montelukast the Better Choice?
For Allergic Asthma
If your allergies trigger wheezing, chest tightness, or shortness of breath, a healthcare professional will often prioritize montelukast. Because it is approved to treat both allergies and asthma, it provides a dual-action benefit that a standard antihistamine does not.
For “Non-Responders” to Nasal Sprays
Many people find that nasal corticosteroid sprays (like Flonase, or fluticasone) don’t fully clear their nasal passages. This may happen because leukotrienes are driving the congestion. Montelukast can help open these nasal passages by blocking the effects of leukotrienes.
For Year-Round Symptoms
For those with perennial allergies (dust mites, pet dander, or mold), Montelukast offers a steady, 24-hour shield. Unlike antihistamines that can lose effectiveness over time (tolerance), montelukast remains fairly consistent for long-term management.
How to Save on Your Allergy Prescription
Because montelukast is a maintenance medication that you may need to take daily for months at a time, the retail cost can become a burden, especially for those in high-deductible plans.
- Stick to Generic: Generic Montelukast provides the exact same chemical benefit as Singulair, but can save you hundreds of dollars per refill.
- Compare Local Prices: Pharmacies often have vastly different pricing for the same generic script.
- Use a Discount Coupon: Save up to 85% on your prescription costs. Compare pricing and get verified discounts at over 74,000 trusted pharmacies by checking Super.com/rx before you head to the counter.
Frequently Asked Questions
How long does it take for montelukast to start working?
It typically takes 1 to 2 days for the medication to build up in your system. It is not an “as-needed” rescue medication for an active allergy attack; it should be taken consistently every day to prevent symptoms.
Can I take Montelukast with Zyrtec?
Yes, many healthcare professionals recommend combining a leukotriene modifier with an antihistamine. This “dual-pathway” approach covers both histamine and leukotrienes, providing more comprehensive relief than either medication could offer alone.
Why is montelukast prescription-only while other allergy meds are OTC?
Montelukast is a potent medication that requires a healthcare professional’s oversight. It carries a “Boxed Warning” regarding potential mental health side effects (such as agitation or sleep disturbances), so it is important to discuss your history with a healthcare professional before starting.
Does generic montelukast work as well as Singulair?
Yes. The FDA ensures that generic medications are bioequivalent to the brand name. Generic montelukast contains the same active ingredient and will provide the same relief for your allergy or asthma symptoms at a much lower cost.
How do I use a Super+ RX coupon for my prescription?
Simply visit Super.com/rx, search for montelukast, and select your preferred pharmacy. Show the digital coupon on your phone to the pharmacist when you pick up your medication to access the discounted rate immediately.
Save on your prescriptions: Visit Super.com/rx to compare prices and get verified discounts at over 74,000 trusted pharmacies. Save up to 85% on your prescription costs with a digital coupon.
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.
References
Farzam K, Sabir S, O’Rourke MC. Antihistamines. StatPearls. December 13, 2025. Accessed April 15, 2026. https://www.ncbi.nlm.nih.gov/books/NBK538188/
Wermuth HR, Badri T, Takov V. Montelukast. StatPearls. March 22, 2023. Accessed April 15, 2026. https://www.ncbi.nlm.nih.gov/books/NBK459301/
