Hello Keemat Charaya, Thank you for asking at HCM. I went through your details and would like to say as follows: 1. I would give almost same treatment in my child-patients with asthma. I would rather give montelukast 4 mg in this age group. 2. I would like to make sure that you are using nebulizer in a correct way. The chamber of nebulizer should contain minimum 3-4 ml of liquid to give effective nebulization. Also, after each use, tubings & masks should be cleaned properly to avoid future infections from nebulization itself. 3. If above treatment does not cause improvement or your son has a severe attach, he may need corticosteroid treatment. 4. In addition to above, I would suggest him adequate fluids by mouth (preferably ward fluids) and avoidance of exposure to dusts & smokes, if any. 5. Common side effects of above medicines are as follows: a. Budecort nebulization - usually safe b. Salbutamol + Sodium chloride nebulization - tremors, increased heart rate, irritability, etc c. Montelukast - nausea, vomiting, headache d. Cetirizine - sedation, drownsiness If your son is not experiencing above side effects, the treatment should be safely continued. Hope above answer will be helpful to you. Should you have further query, please feel free to ask at HCM. Wish your son the best of the health. Thank you & Regards.