Hi there, I understand your concern, and I would like to assure you that the Montair is appropriate for him at this time. Montair, or montelukast can be taken for allergies and asthma both as a relief and maintenance therapy. It all depends on how long he will be exposed to the allergens. In fact, it would suit him if it is very clearly a seasonal type allergy, because then he can take it throughout the pollen season, and stop it the rest of the year. What the other doctor means is that it is not appropriate for immediate rescue the way a nebuliser can be used, because it takes a few hours to even be absorbed. If your son is very breathless, it probably will not work fast enough, much like how an antihistamine is not meant to stop the allergy immediately. You should find that adding on Montair will make him need the nebuliser less frequently, because it brings down the general level of allergic reaction in the body. I will repeat that it is not meant to replace the nebuliser, which is a short term rescue solution when he is breathless. Hopefully, just decreasing the need for nebulisers will make his allergy more manageable through the season. Hope this helps, and all the best to you. Regards, Dr. Teh