Hello dear..I have gone through your post in which you have mentioned about wheezing in your son. Wheezing is a continuous, coarse, whistling sound produced during breathing due to broncho-constriction (obstruction of smaller airway passages) which is indicative of Hyper-responsiveness of air passages (seasonal allergy or asthma) The medicines suggested by your Doctor are correct. Nebulisation will provide symptomatic relief by causing broncho-dilation (dilating the smaller airway passages, relieving the obstruction & increasing airflow to lungs) Montair is Montelukast, used as a maintenance therapy to relieve symptoms of seasonal allergies & asthma by reducing broncho-constriction. So...continue the medicines as suggested by the Doctor. There is no need to worry...just make sure that your child is well protected from the cold. Wishing your son a good health and speedy recovery. Thanks & Take care.