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Just wondering if anyone can tell me if Montelukast is a slow release type drug or not?

My little girl aged 15months has been on Montelukast for a couple of months. The last 2 nights for some reason or another we have forgotten to give it her. (I feel terribly guilty about this as we're usually very hot on giving her her meds)

Last night she woke up with her 'asthma cough' as we call it and coughed til she was retching. (She is usually sick with her asthma)

Could the cough coming back be because of not having her Montelukast or would that not have been enough missed to cause it to be problematic? Or was this a coincidence?

We have a consultant appointment Tuesday where its been discussed her changing drugs anyway. I'm just keen to know if this is her asthma deteriating again or just drug related.

Sorry if this is a bit muddled.

Thanks in advance


2 Replies


sorry can't give you a specific answer, but I'd think it is or at least has a long lasting effect of at least 24 hours, but after that I'd would presume the benefits do start to decrease, so once you resume normal use your little person should start to get better.

IIRC did see something that said the effects can last for around 36 hours, so two days missed would be outside that.


To state the prescribing information ""General recommendations. The therapeutic effect of SINGULAIR on parameters of asthma control occurs within one day. Patients should be advised to continue taking SINGULAIR even if their asthma is under control, as well as during periods of worsening asthma."" This is for the paediatric granules and the date of the SPC is August 2009. Hope this helps.


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