After drinking ibuprofen, the child’s body temperature will drop in about 30-60 minutes. If the temperature continues to not drop after taking the antipyretic medicine and the body temperature still exceeds 38.5℃, it is recommended to follow the doctor’s instructions to use the medicine again, and the time between two doses is usually not less than 4 hours. If you drink ibuprofen frequently, it is easy to cause a sudden drop in body temperature and the performance of body temperature not rising or sweating profusely, so it is also easy to become dehydrated, so do not use ibuprofen antipyretic medicine blindly, and make sure to take it under the guidance of a professional physician. After drinking ibuprofen fever reducer, drink some plain water. Drinking water can promote the absorption of drugs, accelerate metabolism, and also effectively promote sweating and urination to take away excess heat from the body, which can promote the decrease of body temperature. If a child has a persistent fever that does not go away, it indicates the presence of infectious factors in the body, most commonly infections caused by viruses, bacteria, mycoplasma, chlamydia and other microorganisms, and it is possible for the fever to last for 3-5 days. Therefore, it is best to go to the hospital in time to identify the cause of the disease, such as routine blood tests and mycoplasma antibody tests. If it is clear that the fever is caused by a viral infection, it is usually necessary to take anti-viral Chinese medicines, such as Pediatric Clear Fever and Detoxification Oral Liquid, or Blue Scutellaria Oral Liquid. If the fever is caused by mycoplasma infection, macrolide antibiotics should be taken promptly for effective treatment, which can significantly shorten the duration of the fever. If the fever is diagnosed to be caused by bacterial infection, be sure to choose the appropriate antibiotics for treatment under the guidance of your doctor, the earlier the treatment, the better the results.