Zuo Gui usually refers to Zuo Gui Pill, which has the efficacy and effect of nourishing the kidney and tonifying yin, and its side effects are not clear at present. Zuo Gui Wan belongs to the category of proprietary Chinese medicines, with a slightly fishy odor and a sour, slightly sweet taste. It is mainly made of Cornu Cervi Pantotrichum, Chinese yam, hyssop, Radix Rehmanniae Praeparata and other herbs. It has the effect of nourishing the kidney and tonifying yin. It can be used to treat symptoms such as lumbar and knee soreness (a feeling of soreness and weakness in the lumbar and knee regions), mental fatigue (loss of spirit), dry mouth, and night sweating (abnormal sweating after going to sleep, and sweating stops after waking up), etc., which are caused by the insufficiency of true yin. The adverse effects of Zuo Gui Wan are not known at this time. However, it should be noted that it is prohibited for those who are allergic to the product, allergic persons should be cautious, pregnant women, children are prohibited, and patients with colds should not take it. Avoid eating greasy food during the medication. If there is no improvement of the symptoms in 2 weeks, or if the symptoms worsen, or if new serious symptoms appear, the medicine should be stopped immediately and go to the hospital. If you need to take the above medication, it is recommended to take it under the guidance of a professional doctor, do not take it privately to avoid adverse consequences.