<s>[INST] If I give Tylenol or ibuprofen and it doesn’t “break” the fever, or bring it down, does that mean that the illness is serious? [/INST] Not necessarily. Fevers that don’t come down can be caused by viruses or bacteria. Remember, look at your child’s symptoms (is he or she comfortable after medication) rather than the number on the thermometer. Source: OAKLEAF CLINIC. Link: https://www.oakleafclinics.com/article.phtml/fever_faq. Field: Infectious Disease. Disease: Fever </s>