Merrill up to 4 times in 24 hours, Merrill is also known as ibuprofen suspension, the active ingredient is ibuprofen, which is one of the drugs recommended nationally and internationally that can be safely used to reduce fever in children. Ibuprofen also has a pain relieving effect, ibuprofen suspension is a drug designed for infants and children, recommended for children with fever above 38.5 ℃ to use antipyretic drugs, if the fever persists then it can be repeated every 6-8 hours, but do not exceed 4 times in 24 hours, used to reduce fever for a maximum of 3 consecutive days. Ibuprofen is a symptomatic drug that can only relieve pain or reduce fever, and does not remove the cause of pain and fever, so it is not suitable for long-term use. It is recommended to be used for no more than 3 consecutive days for fever reduction and no more than 5 consecutive days for pain relief. If the symptoms are not relieved, it is necessary to go to the hospital for further clarification of the cause of the disease and then treat the cause of the disease, in order to treat the disease from the root cause.