Zuo Gui Wan is a basic formula for nourishing yin and tonifying the kidneys, which is symptomatic and has certain nourishing therapeutic effects. The formula of Zuo Gui Wan emphasizes the use of Radix Rehmanniae Praeparata to nourish the kidneys and fill in the true yin as the monarch drug; Fructus Lycii benefits the essence and brightens the eyes (tonifying the essence and promoting the recovery of vision); Cornus officinalis astringes the essence and converges sweating; Cornu Cervi Pantotrichum favors the tonification of yang, while Cornu Cervi Pantotrichum favors nourishing yin. These ingredients are used together to nourish the kidneys and fill in the yin, and the yin submerges the yang. The main effect of this drug is to nourish the kidneys and replenish yin, which can be used to treat kidney yin deficiency, dizziness, lumbago and knee weakness, night sweating (abnormal sweating after going to sleep, but the sweating stops after waking up), spermatorrhea, and dry mouth and tongue. Before taking Zuo Gui Wan orally or after taking the medicine for about 7 days without improvement or worsening of symptoms , be sure to consult a physician first, according to their own situation under the guidance of the physician to use. For kidney yang deficiency, vital fire failure (body kidney yang weakness, warm and promote the function of qi and blood operation is reduced), yang deficiency lumbago with caution; for external cold and dampness, bruises and trauma, qi stagnation and blood stasis (because of qi is not smooth resulting in blood stagnation) resulting in lumbago with caution; for pregnant women, lactating mothers, pregnancy should be prohibited.