I seldom treat a fever. It has a function, and it needs to serve that function.
If their temperature reaches dangerous levels, then I will treat. But Panadol is ALWAYS a last resort in this house, it is nasty stuff. I actually didn't even have any in the house for months we use it so infrequently.
Cool flannels, plenty for fluids and/or breastmilk, tepid bath if needed, rest and cuddles. I tend to follow their cues when they are ill, just as I instinctively know what/how I want to be when I am sick, so do they.

That is my totally non-medical opinion, learned from my highly-trained nurse mother... LOL