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A 16-year-old member asked:

How long does it take for singulair (montelukast) to be effective?

3 doctor answers6 doctors weighed in
Dr. Paul Carter
A Verified Doctoranswered
A US doctor answeredLearn more
2: Singulair (montelukast) can be effective in as few as 2 hours. For patients with exercise induced asthma should take singulair (montelukast) at least 2 hours before exercise to be able to feel the effect of the medication. Because of the inflammatory nature of asthma in most other cases it can take several days to achieve full benefit of the singulair (montelukast).
Dr. Josephine Ruiz-healy
Pediatrics 39 years experience
The other important issue is to be very compliant with your mediciness!
Oct 16, 2011
Dr. James Sublett
Internal Medicine 46 years experience
After the first dose: The onset of effect occurs with the first dose and lasts for about 24 hours. Clinical trials show continued effectiveness for the entire year of the study. Withdrawal does not cause rebound of symptoms.
Dr. Paul Carter
A Verified Doctor commented
A US doctor answered Learn more
For use to prevent exercise induced bronchospasm, take at least 2 hours before exercise.
Mar 26, 2012
Dr. Yoram Padeh
Allergy and Immunology 22 years experience
Hours to days: While the effects of singulair (montelukast) are generally noticed within the first couple of hours after taking the first pill, it can sometimes take a couple of days to experience the full effects. This is because singulair (montelukast) works by blocking an allergy chemical in the body (leukotrienes) which is made later in the course of the allergic reaction and associated with long-term allergy inflammation.

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A 31-year-old member asked:

How long does it take for singulair (montelukast) to act?

1 doctor answer1 doctor weighed in
Dr. Michael Zacharisen
Allergy and Immunology 33 years experience
1 to 30 days: Interestingly, Singulair (montelukast) can have a first dose effect and start working on the first day, or, it can take up to about 30 days to notice an effect. If there has been no change in symptoms within 1 month, it is unlikely that additional doses are necessary.
CA
A 44-year-old member asked:

Is singulair (montelukast) effective by itself?

3 doctor answers7 doctors weighed in
Dr. James Sublett
Internal Medicine 46 years experience
Yes: Montelukast is effective as a "controller" medication in mild asthma and also is approved by the fda for allergic rhinitis (hay fever). It may be used alone or with other allergy/asthma medications. All ashtmatics should have a "reliever inhaler" in addition to their controller medication.
A 38-year-old member asked:

How long does it usually take for singulair (montelukast) to begin working?

2 doctor answers3 doctors weighed in
Dr. Michael Palumbo
Allergy and Immunology 23 years experience
Within one week: If you don't feel improvement within 2 weeks then it won't help you.

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