Patchouli Zhengqi Water can treat heatstroke and should be taken after a heatstroke; there is no mention of preventing heatstroke on the instructions for the drug.
Patchouli Zhengqi Shui is a common proprietary Chinese medicine, which is mainly composed of Chenpi, Houpu, Angelica dahurica, Poria, Dabu Pi, and Shengbianxia.
Pohoi Xiang Zheng Qi Shui can help to relieve exterior dampness (relieve exterior evils and get rid of dampness in the body), regulate qi and neutralize the middle (regulate the qi of the spleen and stomach to make the functions of the spleen and stomach smooth), and can be used to treat heatstroke if there is a headache, heaviness, chest and diaphragm constriction, distension and pain in the epigastric region (stomach and abdomen), vomiting and diarrhea.
It can also be used to treat external wind-cold and internal dampness stagnation (stagnation of dampness in the body due to too cold diet). The medicine usually needs to be taken after the above symptoms have appeared.
Side effects such as rash, itching and dizziness may occur with this medicine. It is contraindicated for those who are allergic to alcohol.
Specific use of the drug should be under the supervision of a doctor.