With the administration of ibuprofen suspension, fever reduction can usually occur after about one hour. When a patient develops a fever with a body temperature over 38.5°C, antipyretic drugs such as ibuprofen suspension, loxoprofen sodium, acetaminophen tablets, etc. may be used. If the patient’s body temperature is lower than 38.5℃, physical cooling, such as warm water baths, ice packs for physical cooling, antipyretic patches and so on, is the main clinical practice. Antipyretic drugs are recommended to be taken after meals to avoid stimulation of the gastrointestinal tract and to drink a lot of water after using antipyretic drugs to avoid deficiency. After using antipyretics, there is a risk of hypokalemia due to excessive sweating and urination, so it is recommended to eat more potassium-rich foods or fruits, such as bananas, oranges, oranges, etc.