Ordinarily, you should not try to suppress fevers. Fevers are beneficial and in fact, body's defense mechanism [1].
[1]https://www.health.harvard.edu/diseases-and-conditions/fever...
[1]https://www.health.harvard.edu/diseases-and-conditions/fever...
Strong fevers should be controlled usually
Also don't forget about patient comfort (if it gets too high it feels awful)