apple jia get well soon. get him to sleep more and drink more water. Usually after the fever medicine, they will want to sleep more. So let Melvin sleep more la!
As long as you can get his fever lower, it should get better from now on. Don't worry to much la! If you have any questions do not hesitate to call your doctor for help. That's what they are for. Usually they welcome all queries (even on the phone).