[Nature and flavor] Sweet and spicy, cool in nature.
 [return through meridians] Returns to the lung and stomach meridians.
 [Effects] Relieve muscles and reduce fever, clear rash, raise yang and stop diarrhea.
 [Indications] It is used for superficial fever, stiffness and pain in the neck and back, measles that does not break out, internal heat and thirst, hot diarrhea and dysentery, and diarrhea due to spleen deficiency.
 【Medical records】
 "Ben Jing": "It cures thirst, excessive heat in the body, vomiting, various arthritis, raises yin energy, and resolves various poisons."
 "Bie Lu": "It can treat headaches caused by colds and strokes, relax muscles, release exterior, induce sweating, and open the pores. It can treat wounds, relieve pain, and pain caused by wind in the ribs." "The juice of the root can treat thirst and severe fever caused by colds and strokes."
 "Annotations to the Classic of Materia Medica": "Kills kudzu, croton, and hundreds of drug poisons."
 Tao Hongjing: "Pound the raw one to extract the juice and drink it to cure fever caused by febrile diseases. Cut the root into crumbs, it can cure wounds and stop bleeding, and also cure malaria and sores."
 "Medicinal Properties": "It can treat upper qi, vomiting, and appetite, and can detoxify alcohol and relieve thirst. Boiled crumbs can treat wounds and relieve fever."
 "Tang Materia Medica": "Take it in powder form to cure dog bites, and drink its juice."
 "Compendium of Materia Medica" says: "The raw one can break blood, heal sores, induce abortion, and detoxify alcohol, treat fever and redness in the body, yellow wine, and red and astringent urine."
 "Rihuazi Bencao": "It can treat chest and diaphragm heat, upset, stuffy and hot, stop bleeding and dysentery, clear the small intestine, discharge pus and break blood, and apply to snake and insect bites."
 "Kaibao Materia Medica": "For children with heat and fullness, drink the juice of Pueraria root."
 "Medical Origin": "It can relieve thirst caused by deficiency-heat in the spleen and stomach."
 Zhang Yuansu: "It can disperse the external evil, and it can make it difficult for children's rashes to come out."
 "Compendium of Materia Medica": "Disperse stagnant fire."
 【Predecessors release medicine】
 Zhang Yuansu: "Using this (Kuang root) to block the path of Taiyang entering Yangming is not a Taiyang medicine. Therefore, when Zhongjing treated Taiyang and Yangming combined diseases, he added ephedra and Kudzu root to Guizhi Decoction. There is also Kudzu root, Huangqin and Huanglian Jieji Decoction, which shows that Kudzu root is not a Taiyang medicine, but a Yangming medicine." "When Taiyang disease first occurs and has not entered Yangming, and the patient has a headache, Kudzu root should not be taken to induce a headache. If taken, it will lead to thieves breaking into the house. It can be taken if the patient has a headache."
 Li Gao: "Gan Ge has a light and floating Qi, which can stimulate the upward movement of stomach Qi, produce body fluids, and relieve muscle heat. It is a holy medicine for treating diarrhea caused by spleen and stomach deficiency."
 "Compendium of Materia Medica" says: "Ten prescriptions of Materia Medica say that lightness can remove solidity, such as ephedra and kudzu root. Ephedra is a medicine for the Taiyang meridian, and it also enters the lung meridian, and the lung governs the skin and hair; kudzu root is a medicine for the Yangming meridian, and it also enters the spleen meridian, and the spleen governs the muscles. Therefore, both medicines are light and dispersing, but their effects are completely different."
 "Compendium of Materia Medica" states: "Kuang root is the main medicine for dispersing the heat evil of Yangming febrile disease, so it is used to treat thirst, fever, heat congestion in the chest and diaphragm and vomiting. It is a wind medicine that disperses and ascends, so it is used to treat various arthralgias." "Those with headache, stiff neck, back pain, and bone pain all over the body due to typhoid fever are caused by the Taiyang meridian. The evil has not yet entered the Yangming meridian, so there is no thirst symptom and it is not suitable to take it."
 "Compendium of Materia Medica" states: "Kuang root clears wind and cold, clears the surface evil, relieves muscle heat, and stops thirst. It is a medicine for purging stomach fire. I have seen many medicines that can release and dispel evil, such as ephedra to remove the cold of the Taiyang Ying, cinnamon twig to relieve the wind of the Taiyang Wei, Saposhnikovia divaricata and Perilla frutescens to disperse the wind and cold of the Taiyang on the surface, Ligusticum chuanxiong and Notopterygium incisum to disperse the cold and dampness of the Taiyang on the surface, all of which are called dispersing medicines, but the dispersing effect of Kudzu root also enters the Taiyang and dispersing wind and cold, which is different. It is not like ephedra, cinnamon, perilla, and Saposhnikovia divaricata, which are pungent, fragrant, warm and dry, dispersing but damaging the middle qi; it is not like Ligusticum chuanxiong and Notopterygium incisum, which are dispersing but have the risk of consuming the Ying and blood. "Shennong Jing" says that it raises Yin Qi, eliminates thirst, and the body is too hot, which clearly belongs to the three Yang surface heat without cold evil, and can disperse and clear it. For example, in cases of colds and typhoid fevers, the cold evil has gone, the superficial Yang has been burning, and the evil heat is hidden in the skin. If the patient has dry mouth, irritability, thirst, headache and fever, the sweet and cold properties of Pueraria root must be used to clear the muscles and reduce fever. Otherwise, if Pueraria root is abandoned and pungent and warm properties (such as hemp, cinnamon, perilla, and fang) are used, not only will the superficial properties be too excessive, but the vital energy will be deficient, which will inevitably lead to excessive sweating and loss of yang. However, the nature of Pueraria root is to relieve muscles. When the muscles are relieved, the heat will subside, the thirst will stop, and the sweat will stop. And the herbal books also say that those who can induce sweating do not induce sweating caused by the cold evil in the three yang meridians, nor do they induce sweating caused by the wind and heat in the meridians. In fact, they induce sweating caused by the cold depression in the three yang meridians, which becomes hot when the depression is extreme. For example, if the sweating in the Taiyang meridian is not thorough and the Yang Qi is depressed, the patient's face will be red at the edges, he will be restless and not know where the pain is, and he will be short of breath. If he sweats more, it is suitable to treat it with Pueraria root decoction, which will relieve the depression and heat, and eliminate the evil by sweating. This is why the herbal books say that those who induce sweating are like this.
 "Compendium of Materia Medica": "Kuerroot, this is used for its cooling and dispersing properties. Although it is good at reaching all the yang meridians, the yangming meridian is the best because it has a light qi, so it is good at dispelling the exterior and inducing sweating. Most dispersing drugs are pungent and hot, but this one is cool and sweet, so it can relieve warm and hot seasonal epidemics. For those who are hot and thirsty, this is the best. It should be the main ingredient, and supplemented with Chaihu, Fang, Gan, and Ju."
 "Pharmaceutical Chemistry": "Kuang root, the root is ascending, and the sweetness is used to disperse the surface. If you use two or three coins more, it can regulate the evil in the muscles, open the pores and sweat. It belongs to the medicine of the Stomach Meridian of Foot Yangming, and treats typhoid fever, dry nose and mouth, eye pain and insomnia, and severe fever of malaria. Ephedra and Perilla can attack the surface, while Kudang root can only relieve the muscles. Because of its sweet and cool nature, it can stimulate the stomach qi. If you use five or six fen less, it can treat stomach deficiency, heat and thirst, vomiting due to alcohol poisoning, stagnation of fire in the stomach, toothache and bad breath. Or it can be used as a spleen-strengthening agent. This medicine has the power to wake up the spleen. The spleen governs muscles and limbs. If the Yang Qi is blocked in the spleen and stomach, the symptoms are not superficial, and the diet is normal, but the skin and limbs are hot like fire. This medicine, together with Cimicifuga, Bupleurum, Saposhnikovia, and Notopterygium, can raise Yang and disperse fire, clear muscles and reduce fever. It is also a medicine often used by Xue Lizhai. If a person has a lockjaw due to wounds, strokes, or spasms, crush the raw Pueraria root juice and drink it with bamboo juice to wake him up. The dry one can be ground into powder and taken with wine. Smallpox is difficult to come out, and this medicine can come out very quickly. "
 "Ben Jing Feng Yuan" says: "Kuang root is light and floating. When used raw, it can raise yang and produce body fluid. When used cooked, it can stimulate stomach qi. Therefore, it can be used to treat thirst caused by stomach deficiency. Qiwei Baizhu San can also be used. Qingshu Yiqi Decoction combined with Huangbai can be used because summer heat damages Yangming and the forehead and skull will swell. Without this, it cannot be opened up."
 "Ben Jing Shu Zheng" states: "The wonderful use of Pueraria root is that it is not just like Trichosanthes kirilowii, which only moistens the yin fluid, nor is it just like Cimicifuga, which only raises the yang qi, but it can combine the advantages of both. Therefore, it can be used for patients with combined diseases of Taiyang and Yangming, those with diarrhea (Ge Gen Tang syndrome), those with Taiyang meridians being suppressed and diarrhea continuing, and those with rapid pulse, panting and sweating (Ge Gen Qin Lian Tang syndrome). The benefits of both are that the yang is strong outside and does not interact with the yin, so the yin is not solid and flows downward. If the yin qi is raised and combined with the yang qi, it can be pulled upward, then not only the diarrhea can be stopped, but also the yang that is blocked outside can be dispersed with the swelling of the stomach yang."
 "Yao An Medical Collection": "Kuang root is a must-use medicine for macules and rashes, but it does not mean that it cannot be used if spots are seen. Shama and hemp are mainly for penetration, and the fear is that they are trapped. How can it be used if spots are seen? However, regardless of shama and hemp, if the tongue is red and dry, it is heat entering the Ying, which cannot be cured by rhinoceros horn and Rehmannia. If kudzu root is used incorrectly, a variety of symptoms will occur, which should not be ignored. In addition, if Yangming symptoms of typhoid fever have appeared, but Taiyang has not stopped, it is good to use kudzu root. If Taiyang has stopped and it is purely a Yangming meridian symptom, it is also good to use kudzu root. However, it is not suitable for febrile diseases that belong to damp-heat and latent heat and autumn evil. This should be paid attention to in symptom differentiation. If it is used in the same way, latent heat and autumn evil will cause white muteness, and it is harmful to use it improperly."
 "Compendium of Materia Medica" states: "Kuang root, with its light smell and taste, is the best at promoting the clear Yang Qi of the spleen and stomach. "Treatise on Febrile Diseases" considers it the main medicine for Yangming. It is because the coldness of the exterior is too depressed outside that the Yang Qi of the stomach cannot be dispersed. Therefore, this light and lifting medicine is used to quickly move the clear Yang and defend against the coldness of the exterior. The evil of the exterior is eliminated and the Yang of the stomach is relaxed. Therefore, there is still ephedra in Kudzu root soup, which is clearly the main medicine for Yangming exterior cold, not for Yangming interior heat. If it has spread to the interior and becomes Yangming heat syndrome, then Zhang Zhongjing has his own Baihu method, which is not suitable for Kudzu root soup. His Kudzu root Huangqin Huanglian soup is for Yangming heat and diarrhea. It seems to be specially designed for real heat in the interior, so the bitter and cold scutellaria and coptis are used, so Kudzu root seems to be a product for clearing the interior. However, if you know this, This is a change in the treatment of Taiyang disease with Guizhi syndrome, in which the doctor prescribed purgatives instead. The evil heat entered the interior due to the mistaken purgation. Although the interior should be cleared, the diarrhea did not stop. That is, in the case of the spleen and stomach clear yang sinking, Pueraria root is only used to lift the sunken Qi, and it is not designed to clear the interior. This is the true purpose of Master Zhong's selection of Pueraria root. From this, we can infer that the main treatment for thirst in "Ben Jing" is also due to excessive dryness, and the rapid descending of Qi, so even if you drink a lot, your thirst is not relieved. This medicine not only moisturizes dryness, but also raises clearness. In addition, the main treatment for vomiting is also due to the inability of stomach Qi to spread, which makes it impossible to eat. It cannot be used to treat vomiting caused by stomach fire going up. But it is only known as an ordinary medicine that clears the stomach and produces fluid, and is sweet and moist to reduce fever. It seems to be true but it is not. It is a mistake of a thousand miles to make a difference."
 [Note] Pueraria lobata root is good at lowering blood lipids, nourishing the skin and beautifying the complexion, protecting the liver and promoting bile secretion, and fighting and preventing cancer.