What is the story behind the purple small flowers, known as "blood-tuberculosis holy medicine"?

Aster tataricus, a key herb in clinical treatments for moistening the lungs, stopping coughs, and resolving phlegm, is documented in the "Shen Nong Ben Cao Jing" from the Han Dynasty and was classified as a middle-grade herb. "Ben Cao Cong Xin" records it as: "Treats blood phlegm, known as the blood-tuberculosis holy medicine, and also helps to open and regulate the small intestine." So, what is the origin of the name Aster tataricus? What are its sources, effects, and modern clinical applications? Let’s explore it together today.

Source of Aster tataricus

Aster tataricus comes from the dried roots and rhizomes of the Aster tataricus plant, which belongs to the Asteraceae family. It is primarily produced in Hebei and Anhui provinces. Harvesting occurs in the spring and autumn; the roots and rhizomes with joints and dirt are removed, and they are either braided and dried or directly dried. The herb has a faint fragrance, a sweet and slightly bitter taste. The best quality is purple in color and flexible in texture. "Bencao Gangmu" states that the root is purple and flexible, hence the name. This shows that the name is closely related to its color and texture.

Effects and Common Pairings of Aster tataricus

Aster tataricus, also known as returning soul grass or small braid, has a spicy, bitter taste and a warm nature. It is attributed to the lung meridian. It is effective for moistening the lungs, descending qi, resolving phlegm, and stopping coughs. It is commonly used in clinical practice for phlegm accumulation, cough and wheezing, acute and chronic coughs, as well as coughing with blood due to fatigue. According to the 2020 edition of the "Chinese Pharmacopoeia," there are two forms of Aster tataricus used in clinical practice: Aster tataricus and honey-prepared Aster tataricus. The usual dosage is 5–10g. For severe coughs caused by external pathogens, raw Aster tataricus is recommended, while honey-prepared Aster tataricus is recommended for lung deficiency and long-term cough.

"Ben Jing Shu Zheng" records it as: "Mainly treats cough and reverse qi, cold and heat stagnation in the chest." "Ming Yi Bie Lu" records it as: "Treats coughing up pus and blood, stops wheezing, relieves fatigue and body weakness, and is beneficial for children with fright or seizures." "Ben Cao Cong Xin" records it as: "Treats blood phlegm, known as the blood-tuberculosis holy medicine, and also helps to open and regulate the small intestine." "Ben Cao Zheng Yi" records it as: "Aster tataricus... specializes in dispersing lung stagnation, stabilizing cough, and regulating lung qi and blood."

Modern Applications of Aster tataricus

Modern research shows that Aster tataricus contains flavonoids, terpenoids, saponins, peptides, coumarins, anthraquinones, sterols, organic acids, phenolics, polysaccharides, volatile oils, and alkaloids. Pharmacological studies have shown that Aster tataricus and its components have antibacterial, antitussive, expectorant, antiasthmatic, antiviral, antioxidant, anti-inflammatory, analgesic, diuretic, and tumor-suppressing properties.

Aster tataricus is widely used in various medicinal formulations, such as cough-relief tablets, cough syrups, Ju Hong pills, cough and asthma relief mixtures, Er Mu An Sou pills, acute bronchitis syrup, and more. It is also a key ingredient in many classical formulas, such as Xie Gan Ma Huang Tang, Zhi Sou San, Aster tataricus powder, and An Fei San. From these formulations and classical formulas, it is clear that Aster tataricus is primarily used for promoting lung function, resolving phlegm, and stopping coughs, which aligns with its traditional effects.

Aster tataricus has the effect of moistening the lungs, descending qi, resolving phlegm, and stopping coughs. It can be used for treating coughs of any origin, including external or internal causes, cold or heat, deficiency or excess, and both acute and chronic coughs. It is often used in combination with other herbs like coltsfoot flowers. If using the herb or related medicinal formulations, it should always be done under the guidance of a licensed practitioner of Traditional Chinese Medicine. Safety first, and never self-medicate.