A temperature of 98.5?F is not a fever for a newborn; it is completely normal. However, for a 17-day-old newborn weighing 2.5 kg, you should NOT give paracetamol at home without a paediatrician's advice.

For a 1-month-old baby, do NOT give any medicine at home for fever or vomiting. At this age, these symptoms need medical evaluation.

Paracetamol can be used for a 1-year-old baby with a fever for 2 days. However, it should be used only if advised by a paediatrician.

If your baby's fever keeps coming back 3 to 4 hours after paracetamol, do not increase the dose or give it more often. It is best to see a paediatrician to check the cause and adjust treatment if needed. Meanwhile, keep the baby hydrated and use light clothing or lukewarm sponging for comfort.