Usually, patients with fever can see an effect within 30-60 minutes after taking antipyretic drugs. Antipyretic drugs achieve the effect of reducing fever by inhibiting the factors that bind to the thermoregulatory center, so it is faster to lower the body temperature. Generally, when patients take antipyretic drugs for about 30-60 minutes, they will have sweating symptoms, which proves that antipyretic drugs have worked, and at this time, they can measure their body temperature with a thermometer and can find that their body temperature has dropped, which means that the fever has gone down. However, the reduction of fever does not mean that the disease has been cured, because antipyretic drugs only treat the symptoms, the effect of antipyretic drugs may disappear after the fever symptoms, so antibiotics or antiviral drugs should be applied, and at the same time dynamic observation of temperature changes. During the treatment period, you should always take more temperature and blood tests until the temperature drops to normal and is very stable. When you have a fever, you should reduce bedding, drink more water, and do not take fever-reducing drugs at will.