Before not taking antipyretics 38.6 degrees after taking half an hour after 39.2 degrees, consider that it is caused by insufficient dosage of medication or insensitivity to antipyretics. There are many kinds of antipyretics, such as ibuprofen, acetaminophen, diclofenac sodium, etc. They usually start to take effect about 30 minutes after the medication is administered, and the body temperature will drop significantly. If the body temperature not only doesn’t drop after taking the antipyretics, but also rises, it may be due to the fact that the dose of antipyretic medication is not enough and the infection is more serious, so the body temperature rises. It is also possible that the patient is not sensitive to the antipyretic taken, after taking the drug absorption is slow, resulting in the body temperature does not fall. It is recommended to go to the hospital in time, take fever-reducing treatment under the guidance of the doctor, and clarify the cause of the fever, and treat the cause of the disease.