Dendrobium, Ophiopogon, American ginseng have the effect of nourishing yin and lowering fire, benefiting qi and generating fluids (promoting the production of fluids by replenishing qi), and are used for the treatment of heartburn and irritability, dry mouth and bitter mouth, eye redness and toothache, mouth and tongue sores, and heartburn and insomnia. 1.Dendrobium is the fresh or dried stems of Dendrobium officinale and Dendrobium tasseli of Orchidaceae family, which is sweet in taste, slightly cold in nature, and enters the stomach and kidney meridians. Dendrobium has the effect of nourishing yin and clearing heat, benefiting the stomach and generating fluids, treating dry mouth, loss of appetite, vomiting, heat in the hands, feet and heart, heartburn and insomnia, and soreness and weakness in the waist and knees. Dendrobium should not be used by those who are heavy in cold and dampness, and those who have not yet suffered from fluid injury in the early stage of warm-heat disease. 2. Maitong is the dried tuber of Maitong of Liliaceae family, sweet, slightly bitter, slightly cold in nature, into the heart, lung, stomach meridian, with nourishing yin, moistening the lungs and clearing the heart of the efficacy of the treatment of lung heat and dry cough with little phlegm, heartburn and thirst and other symptoms. Maitake should not be used by people with weak spleen and stomach. 3. American ginseng, also known as American ginseng, is the root of American ginseng, which is a plant in the family of Wujiaceae. It is sweet, slightly bitter and cool in nature, and enters the heart, lung and kidney meridians. American ginseng has the effect of clearing heat and generating fluids, replenishing qi and nourishing yin, and is used for dry mouth and tongue, heartburn and insomnia, dry cough with little phlegm, and so on. It is contraindicated for those with cold and dampness in the spleen and stomach, and those with weakened middle yang. It is not suitable to be used with veratrum. The above drugs need to be used under the guidance of a doctor and according to the individual’s physique after diagnosis and treatment, and should not be used on one’s own.