#ask a pediatrician dear doctor I am the mother of a 4 year old daughter I have a doubt that from which age to which age shall we give vitamin a and vitamin D do children? I am a bit confused since the government authorities in my place came and told us that every 6 months we have to administer this vitamin drops is it true or is there any difference because we had already given her vitamin D drops when she was three or four month old so is it necessary to give her this vitamin drops now