Zhengqi water generally refers to Patchouli Zhengqi water. Patchouli Zhengqi Water has the effects of regulating qi and neutralizing the middle (regulating the qi of the spleen and stomach to make the spleen and stomach function smoothly), relieving the surface and resolving dampness (relieving the evil qi from the external senses and dispelling the dampness in the body). Patchouli Zhenqi Shui is composed of Chinese medicines such as Houpu, Shengmianxia, Angelica dahurica, Chenpi, Cangzhu, Dabai Pi, Patchouli oil, Poria, Perilla leaf oil, etc. It has the efficacy of regulating Qi and harmonizing the middle and relieving the surface and resolving dampness. Clinically, it can be used for colds and flu caused by summer injury (summer heat and dampness), internal dampness and stagnation, or external wind-cold, with symptoms such as distension and pain in the epigastrium (abdomen), chest and diaphragm constriction, headache, vomiting and diarrhea, and other symptoms mentioned above. It should be noted that taking patchouli may cause adverse reactions such as dizziness, vomiting, nausea, skin rash, palpitations (rapid heartbeat, often accompanied by panic). This product contains alcohol and is contraindicated for those who are allergic to the drug ingredients and alcohol. Pay attention to a light diet during the medication, and do not take tonic Chinese medicine at the same time. Huo Xiang Zheng Qi Shui needs to be used under the guidance of a doctor’s discernment to avoid blind use of the drug.