Generally, when younger children have a fever, it is recommended that they be given ibuprofen suspension to reduce the fever.1. Children over the age of four years are usually given ibuprofen granules to reduce the fever, and children between the ages of 4 and 8 years old can be given 0.5 sachets of ibuprofen granules at a time, or 0.1g of ibuprofen granules, which can be of more help in reducing the fever.2. Children over the age of eight years old or adults need to be used at a time with a sachet of Ibuprofen granules to reduce fever. If there is a persistent fever, you can repeat the medication once after an interval of 4-6 hours, and use the medication no more than four times in 24 hours. Generally, for fever above 38.5 degrees, ibuprofen granules can be used to reduce fever. If the temperature is below 38.5 degrees, and there is no history of febrile convulsions or epilepsy, it is not necessary to use ibuprofen granules to reduce fever, and physical cooling to reduce the fever, the fever reduction effect is better.