The usage of Zuo Gui Wan is oral medication, 9g once, twice a day, in accordance with the doctor’s instructions. Zuo Gui Wan is a proprietary Chinese medicine composed of Radix Rehmanniae Praeparata, Fructus Lycii, Semen Cuscutae, Radix Achyranthis Bidentatae, Colla Cornu Cervi Pantotrichum and Colla Corii Asiatica, with the effect of nourishing the kidney and replenishing yin (nourishing the kidney and not suitable for yin of kidney). Clinically, Zuo Gui Wan is mainly used to treat night sweating (abnormal sweating after going to sleep and stopping sweating after waking up), spermatorrhea, lumbago and weakness of legs caused by insufficient kidney yin, as well as treating nervous fatigue (lack of spirit) and dryness of mouth. The medicine is taken orally, 9g once, twice a day. The adverse effects of Zuo Gui Wan are not clear for the time being; it is prohibited for use by pregnant women and children, and should not be taken by patients with colds. Before using the proprietary Chinese medicine Zuo Gui Wan, you should consult a professional doctor, do not self-medication, in order to avoid adverse effects.