I have never given DS (3) conventional fever reducers and yes he has had very high fevers sometimes. I believe that they potentially can cause more harm than good. There is LOTS of medical info out there indicating that fever is an adaptive host response that can interfere with healing and increase morbidity and mortality. With that being said - I also don't want my son to be so uncomfortable that he can't sleep or is totally miserable. When he has gotten that way, I have used homeopathic remedies to bring down his fever and reduce discomfort with great success.
If you are interested in fever and it's benefits and the dangers of antipyretics (particularly tylenol) please PM me Id be happy to share my info.