my 6 months old son is having flu for past 3 months. He has been taking all the flu medicines but did not work. I went to another pead and he had prescribed singulair oral granules 4mg for my son. I have been giving him singulair since than, for past 5 weeks but i don't see any side effect yet, but i m worried after reading this side. I m confused!! can anyone help? i m from Malaysia. any advice is welcome at ****** .