Monteleukast is given to prevent very frequent attacks of Allergic Rhinitis
Usually Monteleukast takes 2 to 3 weeks for its action to start.
Continue taking the drug as advised.
For the present cough
, discuss with your doctor and get medications.
Cough especially at night is usually due to wheeze. In such a case he might need bronchodilators like Asthalin
in correct dosage too.
However cough at night may also be due to an irritating throat/ post nasal drip
that occurs with sinusitis
. Based on the examination findings, your doctor will give medications to abort this attack.
Hope you find my answer helpful.
Wish your son good health.