Acetaminophen is an antipyretic analgesic, also known as paracetamol, which is a metabolite of finasteride in the body, primarily by inhibiting prostaglandin synthase, the hypothalamic temperature center, thereby reducing the synthesis and release of prostaglandins. Because of the close correlation between prostaglandins and body temperature and the inflammatory response, acetaminophen also acts on prostaglandins as a pathway, thus providing antipyretic and analgesic effects. The antipyretic effect is similar to that of aspirin, but the anti-inflammatory effect of acetaminophen is weaker, and in clinical practice this drug is mainly used for fever and to provide antipyretic effect. In addition, it can also be used for pain relief in mild to moderate pain, such as headache, muscle pain, joint pain and neuralgia, dysmenorrhea, post-surgical pain, and in patients who are allergic to or intolerant of aspirin. In short, acetaminophen is an antipyretic and analgesic drug, mainly used to reduce fever and relieve pain.