The main fever reducers, or fever suppositories, that are inserted in the anus are acetaminophen suppositories, ibuprofen suppositories, indomethacin suppositories, and diclofenac sodium suppositories. Acetaminophen is also called paracetamol, indomethacin is also called anti-inflammatory pain, and diclofenac sodium is also called diclofenac pain. Acetaminophen, ibuprofen, indomethacin, diclofenac sodium, they all belong to antipyretic and anti-inflammatory drugs, they all have the effect of reducing fever and pain, they all play the role of reducing fever by inhibiting the synthesis of prostaglandins. They not only reduce fever, but also provide good relief for headache, muscle and joint aches and pains that accompany fever. The two fever-reducing drugs recommended by the World Health Organization are acetaminophen and ibuprofen, which have relatively few side effects, definite action and good safety, and can be the drugs of choice for reducing fever, especially for small children. For small children who cannot cooperate with medication, fever suppositories are a good choice.