6 doctors weighed in:
How long does it take for singulair (montelukast) to be effective?
6 doctors weighed in

Dr. Paul Carter
Internal Medicine - Allergy & Immunology
3 doctors agree
In brief: 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).

In brief: 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. Paul Carter
Dr. Paul Carter
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1 comment
Dr. Josephine Ruiz-Healy
The other important issue is to be very compliant with your mediciness!
Dr. James Sublett
Internal Medicine - Allergy & Immunology
1 doctor agrees
In brief: 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.

In brief: 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. James Sublett
Dr. James Sublett
Thank
1 comment
Dr. Paul Carter
For use to prevent exercise induced bronchospasm, take at least 2 hours before exercise.
Dr. Yoram Padeh
Internal Medicine - Allergy & Immunology
In brief: 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.

In brief: 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.
Dr. Yoram Padeh
Dr. Yoram Padeh
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