Lotus heart in water has the effect of clearing the heart and tranquilizing the mind (by getting rid of the inner heat (irritability and sultriness) to stabilize the mind), transporting the heart and kidneys (the fire of the heart goes down, the water of the kidneys goes up, each other’s control), astringent essence and stopping the bleeding, but the effect of drinking in water is limited, and should be used in accordance with the doctor’s prescription. Lotus heart, a kind of Chinese herbal medicine, lotus heart is bitter in flavor and cold in nature. It belongs to the heart meridian and kidney meridian, and is used clinically for heat into the pericardium (heat evils invading the pericardium), delirium tremens (confusion, babbling), heart and kidney disorders (heart fire is strong, kidney yin is weak, and the physiological functions of the heart and kidneys are out of balance), insomnia and spermatorrhea, and blood heat and vomiting of blood. Lotus heart usage is usually decocted into soup for internal use, or made into a powder for internal use. The effective dose is limited to achieve the therapeutic effect, and the medicine should be used reasonably under the guidance of a doctor. Lian Zi Xin is contraindicated in people with spleen and stomach deficiency (spleen and stomach weakness and cold), and the adverse effects of this drug are not clear.