According to the instructions for use, Pouli Xiang Zheng Qi Shui can be used for colds and flu caused by external wind-cold, internal dampness stagnation (the stagnation of dampness in the body caused by diet that is too cold), or summer summer dampness (the human body is susceptible to the invasion of summer heat and dampness in summer). Patchouli Zhengqi Shui is composed of Atractylodes macrocephala, Pericarpium Citri Reticulatae, Atractylodes macrocephala, Angelica dahurica, Poria cocos, and Picrica dahurica, etc. It has the efficacy of relieving surface dampness, regulating qi and harmonizing the middle. Clinically, it can be used for colds and flu caused by external wind-cold, internal dampness and stagnation, or summer dampness, with headache, heaviness, chest and diaphragm constriction, distension and pain in the epigastric region, vomiting and diarrhea; gastrointestinal colds and flu with the above symptoms. The drug can cause nausea, vomiting, skin rash and other adverse reactions, in addition, it is not advisable to take tonic Chinese medicine at the same time during the period of taking the drug. For patients with colds, it is recommended to go to regular hospitals for treatment under the guidance of professional physicians.