Hi Doctor, My son is now 4 years old, wight about 12.50 kg. After joining the play school, he is regularily discomfort with cold. Our pediatrician told me that his immunity system has to be increased. So she advised to take MONTAIR-4 (pediatric) for 6 months. My question is, by continuous usage of this tablet, whether it will have any side effect for my son?. If so what is the alternative remedy? NB: After taking this tablet for about 2 months, he healthy and not suffering from cold etc.