Acetaminophen is used to treat fever, with side effects such as granulocytopenia, allergic reactions, and abnormal liver and kidney function. 1. Therapeutic effects: Acetaminophen is used to treat fever caused by the common cold or influenza, and is also used to relieve pain, such as headache, migraine, toothache, muscle pain, menstrual cramps and so on. 2. Side effects: common ones are granulocytopenia, allergic reactions, abnormal liver and kidney functions, liver damage, etc. (1) Granulocytopenia can occur after taking acetaminophen. (2) There may be allergic reactions such as rash and urticaria. Fatal and severe adverse skin reactions have been reported in a few patients after acetaminophen use. (3) Prolonged heavy use of the drug can lead to abnormalities in liver and kidney function. (4) Overdose of the drug can lead to severe liver damage. If acetaminophen is required, it is recommended that medical advice be followed.