Radix Codonopsis pilosulae has the effect of strengthening the spleen and the lungs (strengthening the functions of the spleen and the lungs), Ophiopogon has the effect of nourishing Yin and generating body fluid, Astragalus has the effect of tonifying Qi and elevating Yang (tonifying Qi so that Yang can be elevated), and Radix et Rhizoma Ginseng has the effect of tonifying Qi and nourishing Yin. 1. Radix Codonopsis pilosulae: strengthens the spleen and lungs (strengthens the functions of the spleen and lungs), nourishes blood and promotes the production of body fluid. It is used in treating deficiency of spleen and lung qi, cough and asthma, and thirst due to injury of fluid. This drug should not be used together with Veratrum. 2. Ophiopogon: nourishing Yin and generating fluids, moistening the lung and clearing the heart. It is used for dry lung and cough, cough with deficiency of yin, internal heat and thirst (internal heat accompanied by eating, drinking and urinating), and heartburn and insomnia. 3. Astragalus: tonifying qi and elevating yang (replenishing qi so that yang qi rises), benefiting Wei and consolidating the surface, supporting toxin and promoting muscle growth and wound healing, generating fluid and nourishing blood (replenishing the body’s fluid and blood), promoting stagnation and paralysis, and inducing diuresis to reduce edema. This drug is used in the treatment of qi deficiency and weakness, Zhongqi subsidence (deficiency of spleen and stomach qi, with the manifestation of visceral organs falling down), surface deficiency and spontaneous sweating (due to the weakness of muscle surface and frequent natural sweating), blood deficiency and atrophy, paralysis and numbness, carbuncle and gangrene (a kind of venomous sores, which occur in the surface of the body, the limbs, and the internal organs of the acute suppurative disease), difficult to ulcerate, and the long-time ulcer does not converge and other diseases. 4. American ginseng: tonifying qi and nourishing yin, clearing heat and generating fluids. It is effective in treating internal heat and thirst caused by deficiency of Qi and fluid (internal heat accompanied by symptoms such as excessive eating, drinking and urination), dry mouth and throat. This drug should not be used together with Veratrum. Adverse effects of the above drugs are not clear, it is recommended to take under the guidance of a doctor, do not take the drug on your own.