Medically reviewed by Alan Lucks | MD, Alan Lucks MDPC Private Practice - New York on January 4th, 2026.
Singulair (montelukast) is commonly prescribed for asthma and allergic rhinitis.
Dosage varies by age and condition, with specific guidelines for adults and children.
Typical adult dose is 10 mg once daily, while children’s doses range from 4 mg to 5 mg depending on age.
Singulair is taken orally, usually in the evening, to help control asthma.
Missing a dose should be managed carefully to maintain symptom control.
Adjustments may be necessary for specific medical conditions or age groups.
Consulting a healthcare provider through telehealth services like Doctronic.ai can help personalize dosage and treatment plans.
Singulair, known generically as montelukast, is a widely used medication for managing asthma and allergic rhinitis symptoms. It works by blocking leukotrienes, substances in the body that cause inflammation and airway narrowing. Understanding the correct dosage is crucial to getting the most benefit from Singulair while minimizing side effects.
This guide breaks down the typical dosages by age and condition, explains what to do if you miss a dose, and highlights when to seek personalized advice from a healthcare professional.
Form |
Strength |
Typical Adult Dose |
Typical Children’s Dose |
Frequency |
Route |
Maximum Daily Dose |
|---|---|---|---|---|---|---|
Tablet |
10 mg |
10 mg |
Not typically used |
Once daily |
Oral |
10 mg/day |
Chewable Tablet |
4 mg, 5 mg |
Not used |
4 mg (ages 2-5), 5 mg (ages 6-14) |
Once daily |
Oral |
5 mg/day |
Granules |
4 mg |
Not used |
4 mg (ages 6 months to 5 years) |
Once daily |
Oral |
4 mg/day |
For asthma, Singulair helps prevent wheezing, difficulty breathing, and other symptoms. Adults and adolescents 15 years and older typically take 10 mg once daily in the evening. Children’s doses depend on age:
6 to 14 years: 5 mg chewable tablet once daily
2 to 5 years: 4 mg chewable tablet once daily
6 months to 2 years: 4 mg granules once daily
Taking Singulair in the evening is recommended because asthma symptoms often worsen at night.
Singulair is also prescribed for seasonal and perennial allergic rhinitis. The dosing is similar to asthma treatment:
Adults and adolescents 15 years and older: 10 mg once daily
Children 6 to 14 years: 5 mg once daily
Children 2 to 5 years: 4 mg once daily
It can be taken at any time of day for allergy symptoms, but consistency is key.
Adults and adolescents 15 years and older generally take a 10 mg tablet once daily. This dose is effective for both asthma prevention and symptom control in allergic rhinitis. The medication is usually taken in the evening for asthma, but for allergies, the timing can be flexible.
Children’s doses vary based on age and formulation:
6 months to 2 years: 4 mg granules once daily
2 to 5 years: 4 mg chewable tablet once daily
6 to 14 years: 5 mg chewable tablet once daily
It is essential to use the correct formulation and dose for children to ensure safety and effectiveness.
If a dose is missed, take it as soon as you remember on the same day. If it is almost time for the next dose, skip the missed dose and continue your regular schedule. Do not take two doses at once to make up for a missed one. Maintaining consistent daily dosing helps keep symptoms under control.
Patients with liver problems should consult their healthcare provider before starting Singulair. Dose adjustments might be necessary, but specific guidelines depend on the severity of the condition.
There are no widely recommended dose adjustments for kidney impairment or other common conditions, but always discuss your complete medical history with your doctor to ensure safe use.
Overdosing on Singulair is rare but can cause symptoms such as stomach pain, drowsiness, or hyperactivity. If an overdose is suspected, seek emergency medical attention immediately.
Warnings include potential neuropsychiatric events such as mood changes or suicidal thoughts. Any unusual behavior should be reported to a healthcare provider promptly.
Take Singulair exactly as prescribed, once daily.
Swallow tablets whole; chewable tablets should be chewed thoroughly.
Granules can be mixed with a spoonful of cold or room-temperature soft food or liquid.
Do not stop taking Singulair without consulting your healthcare provider, even if symptoms improve.
Inform your doctor about all medications and supplements you are taking to avoid interactions.
For personalized advice on Singulair dosage and to get answers to detailed questions, consider using Doctronic.ai. This AI-powered telehealth platform offers quick, expert-level medical guidance and connects you with licensed doctors for video visits in all 50 states. Whether you need a second opinion or help adjusting your medication, Doctronic provides care that’s fast, smart, and personal.
Yes, Singulair is often used alongside inhaled corticosteroids or bronchodilators. Always follow your doctor’s instructions on combining medications.
Yes, Singulair is approved for children as young as 6 months, but the dose and form must be age-appropriate. Consult your pediatrician for guidance.
Report any side effects to your healthcare provider immediately. Serious side effects, such as mood changes, require prompt medical attention.
Do not stop taking Singulair without consulting your doctor. Stopping suddenly may worsen your symptoms.
Singulair targets leukotrienes, which are different from histamines targeted by antihistamines. It can be used alone or with other allergy medications, depending on your condition.
Telehealth platforms like Doctronic.ai offer convenient access to licensed doctors who can quickly and affordably prescribe or refill Singulair.
Getting the correct Singulair dose is essential for effective asthma and allergy management. Dosage depends on age, condition, and individual health factors. Always follow your healthcare provider’s instructions and use resources like Doctronic.ai for personalized support. With the right approach, Singulair can help you breathe easier and enjoy a better quality of life.
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