Antipyretic and analgesic drugs mainly refer to drugs with antipyretic and analgesic effects, mainly non-steroidal anti-inflammatory drugs, some drugs also have anti-inflammatory effects, more commonly used are aspirin, acetaminophen, indomethacin, diclofenac, ibuprofen, etc.. These drugs mainly produce antipyretic, analgesic and anti-inflammatory effects by inhibiting the synthesis of prostaglandins in the central nervous system, and also in peripheral tissues. The effect on analgesia can only relieve weak to moderate pain, the site of analgesic effect is mainly in the periphery, and has no effect on severe pain caused by various traumas and pain in the smooth muscle of internal organs, and has a better effect on chronic pain, such as headache, joint and muscle pain, toothache, dysmenorrhea, This drug can only bring down the body temperature of patients with fever, and has no effect on normal body temperature. It should be noted that antipyretic drugs can only be symptomatic treatment, and the body temperature will rise again after the drugs are cleared from the body, so patients with fever should focus on the treatment of the cause. The use of high fever is generally not more than three days, and the use of analgesics is generally not recommended for more than five days, and such drugs should be avoided for a long time, and alcohol must be avoided during the period of taking them.