Hello: Rehmannia glutinosa is a heat-clearing and blood-cooling medicine in traditional Chinese medicine. It has the effects of clearing away heat and cooling blood, nourishing yin and promoting fluid production. Epimedium is a yang-tonifying medicine in traditional Chinese medicine, which can nourish the kidneys and strengthen yang, strengthen muscles and bones. , dispelling wind and dampness, relieving cough and asthma; the same application of Rehmannia glutinosa and Epimedium should have the effect of nourishing yin, promoting body fluid, tonifying kidney and strengthening yang; but it is best to use it under the guidance of a doctor.