Generally speaking, the duration of action of the antipyretic patch is 3 hours, but the specific duration of the antipyretic patch depends on the patient’s fever reduction. Patients with fever, generally inflammation in the body, antipyretic paste is a short-acting, short-term auxiliary local cooling, the duration of action is generally 3 hours. If a patient has a high fever that does not subside, he may choose to use a fever-reducing patch. When the fever-reducing patch is ineffective and the patient still has fever, he may switch to a fever-reducing patch. However, fever patches are not the main method of fever reduction. Patients should clarify the cause of the fever and treat the cause, and after eliminating the cause, the patient can reduce the fever. In addition, if the patient has a mild to moderate fever, he or she can use other physical cooling methods instead of a fever patch, such as wiping the body with warm water to help the body evaporate and dissipate heat, or drinking more water.