Taking too much fever medicine will cause some harm to the body, mainly to the human immune system and blood system and digestive system. For example, if you take too much fever-reducing drugs, the white blood cells will drop, white blood cells are the immune cells of the human body, low white blood cells will lead to poor resistance and immunity of the body, easy to occur diseases, such as colds, recurrent fevers and so on. In addition to the effect on white blood cells, it also has a certain effect on the brain nerves, which will inhibit the development of brain cells. Fever-reducing drugs are non-steroidal drugs, and taking too many of them can cause drug resistance as well as gastrointestinal tract irritation, which can lead to regurgitation, nausea, bloating, and abdominal pain. The rational use of antipyretic drugs rarely have adverse reactions, antipyretic drugs can only be used as a temporary drug, not as a regular drug, if the fever does not go away, we must further identify the cause of the disease.