A member asked:

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

A doctor has provided 1 answer
Dr. Michael Zacharisen answered

Specializes in Allergy and Immunology

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.

Answered 3/4/2018

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Best time to take Singulair (montelukast) oral 10mg?

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