Patchouli Zhengqi Water has the effect of relieving the surface and resolving dampness (relieving the evils of external sensation and getting rid of dampness in the body), regulating qi and neutralizing the middle (regulating the qi of the spleen and stomach to make the functions of the spleen and stomach smooth), and it can be used for the treatment of the symptoms corresponding to the heatstroke under the guidance of the doctor. However, drinking it in advance does not prevent heatstroke. Haoxiang Zhengqi Shui is composed of Cangzhu, Chenpi, Houpu, Angelica dahurica, Poria, Dabu Pi, and Shengbianxia, etc. It has the efficacy of detoxifying and resolving dampness, regulating qi and harmonizing the middle of the body. It can be used for colds and flu caused by external wind-cold, internal dampness stagnation (the stagnation of dampness in the body due to overly cold diet) or summer dampness (the human body is easily violated by summer heat and dampness in summer), with symptoms such as headache, heaviness, chest and diaphragm constriction, distension and pain in the epigastric region, vomiting and diarrhea, as well as gastrointestinal colds with the above mentioned symptoms. The drug may cause nausea, vomiting, skin rashes, itching and other adverse reactions, and it is not advisable to take tonic Chinese medicine at the same time. Patients suffering from heatstroke are advised to go to regular hospitals for treatment under the guidance of professional physicians.