[Nature and flavor] Sweet and bitter, cold in nature.
 [return through meridians] enters the lung and kidney meridians.
 【Function】Nourishes yin, moistens dryness, clears the lungs and reduces heat.
 [Indications] Dry-heat cough, yin deficiency and fatigue cough, yin damage due to febrile disease, internal heat and thirst, dry intestines and constipation, sore throat.
 【Precautions】Do not take this medicine if you have diarrhea due to cold or cough caused by wind. Avoid taking carp. Avoid taking turmeric.
 【Medical records】
 "Ben Jing": "It is used to treat all kinds of violent wind and rheumatism, hemiplegia, strengthen the bone marrow, and kill three kinds of worms."
 "Bie Lu": "It can preserve lung qi, remove cold and heat, nourish the skin, increase energy, promote urination, and can nourish the body while being cold."
 "Medicinal Properties": "It can cure lung-qi cough, shortness of breath, remove heat, promote kidney qi, treat lung atrophy, carbuncle and pus vomiting, treat dampness and scabies, stop thirst, and remove heat and stroke. It is suitable for long-term use."
 Qianjin Fang: "It can treat consumptive fatigue, injury, old age, hemiplegia, rheumatism, cold numbness, accumulation of abdominal mass, malignant sores, carbuncle, swelling and leprosy, and also treat impotence, deafness and blindness."
 "Rihuazi Materia Medica": "Calming the heart, moistening the five internal organs, benefiting the skin, brightening the complexion, replenishing the five labors and seven injuries, treating lung qi and cough, eliminating phlegm, rheumatism, heat toxins, wandering wind, vomiting blood due to depression."
 Wang Haogu: "It is used to treat heart diseases such as dry throat, heart pain, thirst and desire to drink, paralysis and love of lying down, and heat and pain in the feet."
 "Compendium of Materia Medica" says: "It can eliminate heat and stranguria, stop bleeding and excessive bleeding, and moisten dry stool and constipation."
 "Compendium of Materia Medica": "It moisturizes dryness, nourishes Yin, clears metal and reduces fire."
 "Bencao Yanyi" says: Asparagus cochinchinensis is mainly used to treat lung heat. It tastes bitter, but it has the effect of purging rather than astringing. Therefore, people with cold should avoid taking it.
 【Predecessors release medicine】
 "Compendium of Materia Medica Mengquan": Asparagus and Radix Ophiopogonis both enter the hand Taiyin meridian, and can dispel restlessness and thirst, relieve cough and eliminate phlegm. Their functions are similar, but they are actually superior. Radix Ophiopogonis also travels to the heart of the hand Shaoyin, often clearing the heart and reducing fire, so that the lungs are not offended by evil spirits, so it is effective in relieving cough immediately; Asparagus travels to the kidney of the foot Shaoyin, repeatedly nourishing the kidney and helping the essence, so that the lungs can get the whole mother's qi, so it has a special effect in eliminating phlegm. Phlegm is condensed by body fluid, and the kidney is the body fluid. If it is dry, it will condense, and if it is moist, it will dissolve. Asparagus is a moisturizing agent, and it travels to the kidney meridian, so even if the body fluid is condensed, it can be dissolved. Although Radix Ophiopogonis is a moisturizing agent, it has different meridians, so it is not better than Radix Ophiopogonis in relieving cough, and it must be inferior to Asparagus in eliminating phlegm. The ancient philosophers also said that the symptoms of phlegm are in the spleen, and the root of phlegm is in the kidney. It is also said that Pinellia can only treat the symptoms of phlegm, but not the root of phlegm. From this perspective, Asparagus cochinchinensis can only treat the root cause of phlegm, but not the symptoms of phlegm. This is not only different from Ophiopogon japonicus, but also from Pinellia ternata.
 "Compendium of Materia Medica" says: Asparagus cochinchinensis is a medicine that moistens dryness, nourishes yin, reduces fire and clears the lungs. It is necessary to treat lung and kidney fire dryness diseases, such as lung heat and leaf scorch, which can cause paralysis, vomiting blood and coughing, thirst and kidney consumption, bone steaming and heat fatigue. The ancients said that it can eliminate hemiplegia and strengthen the bone marrow, because hemiplegia is caused by lung heat, kidney heat and marrow dryness, and tendons withering and not flourishing. Asparagus cochinchinensis moistens yin and replenishes cold, moistens dryness and clears heat, so that the bone marrow is strong and hemiplegia can be cured. However, it is suitable for those with deficiency of the Yuan and heat.
 "Changsha Yaojie": Asparagus cochinchinensis clears the metal and transforms water, quenches thirst and produces body fluid, eliminates sore throat, and eliminates coughing and vomiting pus and blood. "Shang Han" uses it in Ma Huang Sheng Ma Tang to treat Jueyin cold, after a large bowel movement, throat discomfort, vomiting pus and blood, and diarrhea. It clears fire and benefits the throat, treats lung abscesses and discharges pus and blood. Asparagus cochinchinensis moisturizes and cools, and its power to clear metal and transform water is ten times that of Ophiopogon japonicus. It is very suitable for those with dry soil and dry water. For those with Yangming cold, dry soil steals water, and the intestines and stomach are scorched and dry; for those with plague and macules, the camp heat is depressed inside, and the internal organs are burned and steamed; all of these are blocked and astringent, and Cheng Qi must be used, so that the dryness is not too severe, and it can be used to clear the metal and discharge heat, nourish water and lubricate the intestines, and the original essence should not be damaged, which is better than taking rhubarb. Or if the sore and ulcer are hot and the stool is constipated, a heavy dose of wine decoction is also good. It is cold, slippery and wet in nature, which is the most damaging to the spleen and stomach and drains the large intestine. It should be avoided by those with yang deficiency and yin excess, and those with wet soil and slippery stools. If the patient is dehydrated and suitable for food, it must be prepared with a flavor that can diuretic and benefit the body to prevent it from causing dampness.
 "Ben Cao Zheng Yi" says: Asparagus cochinchinensis is thick and fat. Although the "Ben Jing" says that it is bitter and flat, it is actually very sweet, with a light smell and a thick taste. It is purely for moistening and nourishing fluids. The "Ben Jing" treats violent winds, which refers to the wind caused by the dryness of fluids. If it nourishes and benefits the yin, the wind and yang will naturally subside. This is the meaning of treating blood first to treat wind. Bi is also a disease caused by blood not nourishing the tendons, which is caused by wind and dryness. Therefore, treating wind can also treat Bi, not to eliminate the wind and bi from the outside. However, dampness is a yin and cold evil. Bi disease is also caused by dampness. However, there must be no sweet and cold yin medicine that can treat dampness and bi. It is probably a mistake made by the copyists. Asparagus cochinchinensis is soft and moist, how can it treat the damp evil of yin haze and bi? The "Ben Jing" also says that it strengthens the bone marrow, which is the correct purpose of replenishing fluids and nourishing yin. The three worms lie dead, which is the fatigue tuberculosis caused by blood dryness and dry fluids. Sweet, cold and moist, it is originally used to nourish dryness and moisten dryness, so it is treated. The "Bie Lu" says that it can preserve the lung qi, which refers to the fact that the lung is hot and the leaves are scorched, and the dry metal is burned. The sweet and cold moisturizing dryness is originally the right way to nourish the lung. It can remove cold and heat, and it is also the cold and heat caused by the depletion of yin fluid, which is not the cold and heat caused by the exogenous evil. It nourishes the skin and strengthens the qi, which all mean that the yin fluid is sufficient. For those who promote urination, the lung metal is suppressed and descended, and the upper source of the water channel is clear, and the body fluid is also gushing, and the bladder's qi is naturally prosperous, which is not the case of the water channel blocked by dampness and heat. And the sentence "cold and can replenish" shows that Tiandong is more cold, and it is only suitable for those with blazing dry fire and burning yin fluid, and it means that it is not up to the task for those with weak yang qi. This is why "Bie Lu" has the word "great cold", and all the "Compendium of Materia Medica" since the Six Dynasties have been used to treat the symptoms of dry fire. Zhen Quan said that the treatment of lung qi cough and shortness of breath is because the lung metal is dry and the shortness of breath is uncomfortable, so it is appropriate to nourish it with sweet, cold, soft and moist medicine, so that the qi reversal can be calmed and the shortness of breath can be stabilized, which is the meaning of "Famous Doctors' Records" to preserve the lung qi. Zhang Jiegu also said that the treatment of blood heat invading the lungs and shortness of breath is all for deficiency symptoms, and the shortness of breath and cough caused by turbid phlegm blocking is definitely not the treatment. Zhen Quan also said that the treatment of pulmonary emphysema, carbuncle, and vomiting of pus is to remove heat, then emphysema is caused by lung heat and scorched leaves, so sweet, cold and moist medicine is suitable, while carbuncle is caused by both phlegm and fire, and pus and blood are vomited, so only bitter and cold medicine can be used to clear it, and this soft and moist medicine with many fats is definitely not suitable. One is deficiency and the other is excess, which is very different. It is not without misunderstanding to associate them together, and Jiegu said that bitter medicine can be used to relieve stagnant blood, which is actually inconsistent with the nature of this medicine and must be distinguished. Only when lung abscess is about to heal, pus and phlegm have been reduced, turbid dirt has been removed, the vital energy has been damaged, and the remaining flame is still strong, then Tiandong is very cold, which can dissipate the remaining heat, and the taste is clear and not too greasy, which is close to it. This disease has the distinction between the beginning and the end, and the evil has the distinction between the severity and urgency, so it must not be said in a fuzzy way without distinction. Wang Haizang said that the treatment of paralysis, syncope, and love of lying, and the heat and pain under the feet is the sign of lung heat and atrophy, and the deficiency of yin and excessive fire. Sun Zhenren also said that the yang cannot rise, so it is advisable to take it regularly, because the yin essence is exhausted and wasted, so it is advisable to nourish the yin to nourish its dryness.