The medicines to prevent heatstroke and cool down are the following categories: 1. Chinese herbal medicine category includes patchouli water, patchouli liquid, patchouli soft capsule and rendan, all of which can play a role in the effect of heatstroke and cool down, and can be applied in time once the patient has heatstroke. 2. Western medicine can store chilled physiological saline, chilled glucose water, and control the temperature of the liquid to about 0-8℃, and if the patient has heat cramps, heat exhaustion and heat stroke can be infused when heat stroke occurs. In addition, saline at 0-8°C can also be used for physical cooling, for example, when a patient has heat stroke, extracorporeal ice packs can be applied to the carotid arteries bilaterally and to the temples of the forehead, which can provide proper cooling. Iced sugar and green beans can also be boiled into water and stored in the refrigerator as a drink to prevent heatstroke.