<s>[INST] Hi Doctor, My son is 5 yrs old and his weight is around 15kg. He is very lazy in taking proper meal and do not like to take anything but we try and he take meal after a long activity. Kindly advice me how to treat my son and what should i give him which may increase his weight?? my email address is YYYY@YYYY Regards// Malik Shoaim [/INST] Hi...there is no medicine to increase appetite. Your son is slightly underweight I agree but, at the same time rather than weight, what is more important is his activity and development. If these are normal, you need not worry. PLEASE DO NOT GIVE ANY SO-CALLED APPETITE STIMULANTS AS THEY ARE NOT VERY SCIENTIFICALLY PROVEN AND THEY HAVE THE SIDE EFFECT OF EXCESSIVE Chat Doctor. Hope my answer was helpful for you.  I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health. </s>