【Nature and flavor】Sweet in flavor, cold in nature.
 【Enter meridians】Enter the liver, kidney, lung and small intestine meridians.
 [Effects] Clears away heat, promotes diuresis and relieves stranguria, eliminates dampness and stops diarrhea, improves eyesight, eliminates phlegm, cools blood and detoxifies.
 【Indications】Heat accumulation in the bladder; difficulty urinating; stranguria and leukorrhea; dysentery due to summer heat and dampness; epistaxis; hematuria; red eyes due to liver heat; sore throat; carbuncle, swelling and ulcer
 [Usage and Dosage] Decoction, 9-15g, preferably wrapped for decoction.
 [Contraindications] Use with caution in patients with kidney deficiency and spermatorrhea and pregnant women.
 【Medical records】
 "Bie Lu" says: "Plantago asiatica grows on the rice road in Pingze Hill, Zhending. It is picked on May 5th and dried in the shade."
 "Compendium of Materia Medica Annotations": "There are many in people's homes and on the roadside. "Han Shi" also said that the tree of kohlrabi is similar to plum, and eating its fruit is good for descendants, which is wrong."
 "Compendium of Materia Medica": "Nowadays, people pick seedlings in May and fruits in July and August. People plant it in their gardens, especially in Sichuan. Northerners take the roots and dry them in the sun, and sell them as purple flowers, which is a big mistake. According to "Zhou Nan Shi", it says: Pick the radish. "Er Ya" says that radish is horse shoes; horse shoes are plantain. Guo Pu said: Today's plantain has large leaves in the road and long spikes. It grows well by the roadside. People in Jiangdong call it "shrimp toad clothes."
 "Compendium of Materia Medica for Famine Relief" states: "The center of the leaf cluster has three or four stems, which are long spikes like rat tails. The flowers are dense, green, slightly red. The fruits are like sedge seeds, red and black. They grow by the roadside. Pick the young seedlings and leaves, steam them, soak them in water to remove the saliva, wash them clean, and season with oil and salt before eating."
 "Compendium of Materia Medica": "In Wang Min's "Records of Mountain Dwelling", there is a method of cutting and eating the plant shoots. In the past, people often regarded it as a vegetable. Nowadays, wild people still pick and eat it."
 "Illustrated Records of Plant Names and Realities": "Cheqian is a top-grade plant in the Classic of Materia Medica. "Erya": 苤苢, horse heel; horse heel is Cheqian. Some people who interpret the Book of Songs think that it can cure diseases, while others think that it is good for having children. They all heard from their teachers and cannot be refuted. "Yi Zhou Shu" says it is 桴苢; "Han Tao" says it is 本, which is similar to plum and can be eaten. This theory is based on this. Ancient and modern plants have the same name but different objects, and the same object has different names. How can we list them all?" Guo's annotations to "Erya" mostly retain the old theories, which can be learned from. "Jiuhuang Bencao" calls it "Nianluncai". Yu is similar to Nongjiu: "Erya": 苤苢, horse heel, Cheqian. The previous ones are not difficult to recognize. What do the "Han Shi" say that it is Zexi? After the Han Dynasty inherited the lost learning of the Qin Dynasty, there was a gap in the books. Scholars tried their best to stick to their teachers' theories and passed them down by word of mouth. Although there were other interpretations, they did not dare to change them at will. They were very cautious. Wang Anshi proposed his own new learning, but he could not understand it, so he would change it to another theory to explain it. However, he thought that the new law should never be abolished. He regarded governing the country as less important than studying the classics. The name of Cheqian is known to a three-foot-tall boy. In southern Yunnan, it is called Xiamaoye, which is the transliteration of Xiamaoyi. In the dialect of remote areas, the name is still used as a metaphor. "
 【Predecessors release medicine】
 "Bie Lu": It can treat wounds, stop bleeding from nose, blood stasis and blood clots, bleeding, red urine, stop restlessness and reduce gas, and eliminate small insects.
 "Ben Jing Feng Yuan" says: "It is forbidden to use if the person is weak and has loose essence and qi."