Dendrobium is a yin tonic, beneficial to the stomach, nourishing the yin and clearing heat. It is used for yin injury and fluid deficiency, dry mouth and thirst, dry vomiting with little food, deficiency heat after illness, dark and unclear eyes. Rehmannia glutinosa is used for clearing heat and promoting generation of body fluid, removing vexation, stopping vomiting and inducing diuresis. It is used for fever and thirst, stomach fever, vomiting and retching, lung fever and cough, lung carbuncle and vomiting pus, hot shower and astringent pain. Used together has the effect of nourishing Yin and clearing heat.