Thank you for your query on Healthcare Magic.
is not a drug to be used as and when required.
It is usually prescribed for long duration like 3 to 6 months in patients with asthma
And it should be taken in the evening as advised by her Pediatrician
In addition to Singulair, the inhaler has to be continued according to the prescription.
It is associated with drowsiness
in some but not associated with wake ups.
But still you are concern about it please consult her Pediatrician for further management.
Hope I have answered your query.