Ibuprofen or acetaminophen, these NSAIDs are used to reduce fever, each drug can be used up to 4 times within 24 hours, each use interval can not be less than 4 hours, and during the fever is not recommended to use a variety of NSAIDs at the same time, if NSAIDs overdose, may lead to adverse reactions, serious cases even acute liver failure and other situations. In addition, fever-reducing drugs like Chinese medicine, such as Xiao Chai Hu granules and Chai Gui fever-reducing granules, can generally only be used a maximum of 3-4 times within 24 hours, while if you use anal fever-reducing drugs such as indomethacin suppositories, they can be used a maximum of 2 times in a day. Therefore, the use of antipyretic drugs has a strict interval and the frequency of use, can not endlessly use multiple antipyretic drugs, so as not to cause damage to the human body.