Zuo Gui Wan is effective in nourishing yin and tonifying the kidney, filling in the essence and marrow (replenishing the essence and semen and promoting bone marrow development). Adverse effects of this formula are mainly gastrointestinal reactions, the drug composition is more nourishing and greasy, and symptoms such as abdominal distension, loss of appetite and diarrhea may occur after too long a period of taking the drug. Zuo Gui Wan is composed of Radix Rehmanniae Praeparata, Rhizoma Dioscoreae, Rhizoma Dioscoreae, Fructus Lycii, Fructus Ziziphi, Radix Achyranthis Bidentatae, Radix et Rhizoma Gastrodiae, Radix et Rhizoma Gastrodiae, Semen Cuscutae, and it is a basic formula to nourish Kidney Yin. It is mainly used in treating vertigo, lumbar and knee weakness (a feeling of soreness and weakness in the waist and knees), spermatorrhea in men, night sweating (abnormal sweating after going to sleep and stopping after waking up), and dry mouth and throat caused by deficiency of kidney yin. In modern times, it is often used in the treatment of Alzheimer’s disease, menopausal syndrome, menstrual irregularities, osteoporosis in the elderly, etc. It is recognized as belonging to those with insufficient kidney yin. Precautions: prohibited for pregnant women; prohibited for those who are allergic to the ingredients of the drug. It is recommended to take under the guidance of a doctor, discomfort and timely follow-up.