
Do not use montelukast to treat an asthma attack that has already begun. It will not work fast enough to reverse your symptoms. Use only a fast-acting inhalation medication to treat an asthma attack. Talk with your doctor if any of your asthma medications do not seem to work as well in treating or preventing asthma attacks.

It is not known if Singulair® (montelukast sodium) passes through breast milk. However, because of the potentially serious side effects that could occur in the nursing infant, the manufacturer of the drug recommends that it be used with caution in breastfeeding women. Therefore, if you are breastfeeding or planning to start, make sure to let your healthcare provider know.


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