Fever kills the viruses and some bacterias, so when your body is
infected, the natural defensive reaction of the body is to increase
the temperature to kill the beasts. When the viruses or bacterias
get killed, the natural reaction of the body is to lower the
temperature. Through sweating toxical and junky substances get out
of the body.
Hence you shouldn't take paracethamol or panadol in the moment when
you realize you have fever, becasue you take your body the chance
to help itself. You should wait few hours, ofcourse when you have
like 39 C, you better take the pill, becasue too high temperature
can be harmful.