Zuo Gui Wan can be taken before or after meals, but should pay attention to contraindications and related precautions, the specific use of drugs should follow the doctor’s instructions. The ingredients of Zuo Gui Wan include Chinese yam, Cornus officinalis, Radix Rehmanniae Praeparata, Semen Cuscutae, Cortex Cuscutae, Cortex Pseudostellariae, Cortex Pseudostellariae, Cornu Cervi, Cornu Cervi, Cornu Cervi Pantotrichum, Fructus Lycii. Zuo Gui Wan is suitable for the treatment of night sweating (abnormal sweating after going to sleep and cessation of sweating after waking up), lumbar soreness and knee weakness, mental fatigue (lack of mental energy), and dryness of the mouth due to deficiency of genuine yin due to its nourishing and tonifying effects on the kidneys and yin. Zuo Gui Wan does not specify the exact time of administration, and it is generally believed that the drug can be taken either before or after meals. Note that the drug is contraindicated, including caution for those who are allergic to the product, and should not be used by people with colds. If there is no improvement in the symptoms after two weeks or during the period of taking the medicine, or if the symptoms worsen, or if new serious symptoms appear, the medicine should be stopped immediately and the patient should go to the hospital for medical consultation. Avoid eating greasy food during the medication. Specific medication should be carried out under the guidance of a specialist, and should not be used without authorization.