Platycodonis Radix
Aliases：Baofu Hua (Bundle Flower); Lingdang Hua (Bellflower); Doraji (Korean name for Platycodon Root); Ku Geng (Bitter Stem); Da Yao (Great Medicine); Geng Cao (Stem Grass); Bai Yao (White Medicine); Li Ru (traditional phonetic name); Fang Tu (traditional phonetic name); Lu Ru (traditional phonetic name); Jixiang Chu (Auspicious Pestle); Tu Renshen (Earth Ginseng).
Jiegeng (Platycodon Root) is the name of a traditional Chinese medicine. It is the dried root of Platycodon grandiflorus (Jacq.) A. DC., a plant in the genus Platycodon of the family Campanulaceae. Platycodon Root was first recorded in Shennong Bencao Jing (The Divine Farmer's Materia Medica). It is an authenticated variety of the National Administration of Traditional Chinese Medicine's Terminology Standardization and Promotion Project and is recorded in Shanghan Lun (Treatise on Cold Damage), Bencao Gangmu (Compendium of Materia Medica), the Pharmacopoeia of the People's Republic of China, Zhonghua Bencao (Chinese Materia Medica), and other herbal works.
Efficacy & Actions
Diffuses Lung Qi, soothes the throat, resolves Phlegm, and expels pus.
Indications
Cough with profuse Phlegm; chest oppression with a sense of unsmoothness; sore throat and hoarseness; lung abscess with expectoration of pus.
Modern Pharmacology
Modern pharmacological studies have confirmed that Platycodon Root possesses the following significant pharmacological activities: Antitussive and expectorant effects: Platycodin D is the core pharmacologically active substance. It exerts antitussive and expectorant effects by stimulating respiratory mucosal secretion and inhibiting MUC5AC protein expression. The molecular mechanism underlying the antitussive and expectorant effects of Jiegeng Tang (a decoction of Platycodon Root and Licorice) is closely related to the inhibition of inflammatory cytokines such as IL-1β and TNF-α, as well as the asthma airway remodeling marker MMP9. Anti-inflammatory effect: Platycodon Root exerts multi-target anti-inflammatory effects by inhibiting signaling pathways such as NF-κB and MAPK (p38, ERK, JNK) and reducing the levels of pro-inflammatory cytokines such as TNF-α, IL-6, and IL-1β. Immunomodulatory effect: Both platycodin D and Platycodon polysaccharides possess immunomodulatory activity and can regulate macrophage function and the immune microenvironment. Antioxidant and antitumor effects: Platycodon Root possesses antioxidant activity. Its active constituents exert antitumor effects through mechanisms such as modulating the tumor immune microenvironment and promoting cancer cell apoptosis. Other pharmacological activities: Studies have also reported that Platycodon Root possesses anti-obesity, hepatoprotective, antidiabetic, antiviral, anti-pulmonary fibrosis, and organ-protective effects, with mechanisms involving the regulation of signaling pathways such as AMPK/PI3K/Akt. Note: The above pharmacological findings are largely derived from modern experimental studies on root extracts of Platycodon Root and constituents such as platycodin D, polysaccharides, and flavonoids. Platycodon Root is a dual-purpose medicinal and edible substance with relatively mild pharmacological actions. Traditional actions and indications should remain the primary basis for use.
Ingredients
The root of Platycodon grandiflorus mainly contains the following active constituents: Triterpenoid saponins (principal active constituents and quality markers): To date, 76 triterpenoid saponins have been isolated and identified from Platycodon Root. These are mainly oleanane-type pentacyclic triterpenoid saponins (platycodin-type saponins), with platycodin D as the representative constituent, along with platycodin A, B, D₂, D₃, and others. Platycodin saponins are also the main material basis for its bitter taste. Flavonoids. Phenolic acids. Polysaccharides: Platycodon polysaccharides possess immunomodulatory and other activities. Polyacetylenes. Sterols, fatty acids, amino acids, and trace elements. Others: Inulin, phytosterols, volatile oils, and other constituents. Note: Platycodin saponins are recognized as the principal material basis for the pharmacological effects of Platycodon Root and as key indicators for its quality control. The Chinese Pharmacopoeia uses platycodin D as the marker constituent for content determination.
Usage & Dosage
Oral use: Decocted in water, 3–10 g; or taken in pills or powders. External use: Appropriate amount (rarely used externally in clinical practice).
Contraindications
Contraindicated in individuals with chronic cough due to Yin deficiency and in those with hemoptysis. Platycodon Root has a dispersing and ascending nature. Its use in individuals with Yin deficiency and hyperactive Fire, chronic cough with scanty Phlegm, or hemoptysis carries the drawbacks of dispersing and consuming Qi and stirring up Heat and Blood, and may aggravate cough and hemoptysis. Use with caution in individuals with gastric or duodenal ulcer. Platycodin saponins have a certain irritating effect on the gastrointestinal mucosa, and there are clinical reports of allergic reactions caused by oral Platycodon Root irritating the gastric mucosa. Use with caution in individuals with Qi counterflow, vomiting, choking cough, or vertigo. Platycodon Root tends to ascend, and it is not suitable for the above Qi-counterflow patterns. Pregnant women and children may consume it in moderation and should not take excessive amounts. As a dual-purpose medicinal and edible substance, it may be consumed by pregnant women and children within an appropriate range, but therapeutic use must be carried out under the guidance of a physician. Do not take it in excessive doses. Overdose may cause nausea and vomiting. Platycodin saponins possess hemolytic activity, and particular attention must be paid when administered by injection; oral administration at conventional doses is relatively safe.
Selected Formulas
For lung abscess with purulent expectoration (Shanghan Lun, Jiegeng Tang) Take 1 liang of Jiegeng (Platycodonis Radix) and 2 liang of Gancao (Glycyrrhizae Radix). Add 3 sheng of water, decoct to 1 sheng, and take warm in two divided doses. Indicated for lung abscess with cough, chest fullness, chills, rapid pulse, dry throat without thirst, foul turbid sputum, and eventual discharge of rice-porridge-like pus. For typhoid-related stuffiness with near-fatal chest fullness (Su Shen Liangfang, Zhike Tang) Take 1 liang each of Jiegeng and honey-fried Zhike (Aurantii Fructus). Chop into rice-bean-sized pieces, add 1.5 sheng of water, decoct to half, remove the residue, and take in two doses. For throat obstruction and toxic qi (Qianjin Yaofang) Take 2 liang of Jiegeng, add 3 sheng of water, decoct to 1 sheng, and take in one dose.
Daily Consumption
Platycodon Honey Tea: Platycodon Root 6 g, honey to taste. Place the Platycodon Root in a cup, pour in boiling water, add honey, and stir well. Steep for 5–10 minutes before drinking. One dose daily. It resolves Phlegm and soothes the throat. It is suitable for individuals with chronic pharyngitis, throat itching and discomfort, or dry cough. Gan Jie Drink: Platycodon Root 6 g, raw Licorice 3 g. Grind the two ingredients into a coarse powder, place in a cup, brew with boiling water, and steep briefly while warm. Drink frequently as a tea substitute. It diffuses Lung Qi and soothes the throat, clears Heat, and removes toxin. It is suitable for sore throat with swelling and pain. Cold-dressed Platycodon (Korean style): Reconstitute dried Platycodon Root, rub with salt, and rinse repeatedly. Cut lengthwise into strips, mix with ginger, garlic, scallion white, chili powder, sugar, and toasted sesame seeds, and refrigerate for 1–2 hours. It has a crisp and chewy texture and is a common food in Northeast China and the Korean Peninsula. Platycodon and Winter Melon Soup: Winter melon 150 g, apricot seed 10 g, Platycodon Root 9 g, and Licorice 6 g. Decoct together until cooked, season, and then eat the winter melon and drink the soup. It disperses Wind and clears Heat, diffuses Lung Qi, and relieves cough. It is suitable for acute bronchitis of the pattern of Wind pathogen attacking the Lung.
Medicinal Parts
Dried root.
Selection & Storage
Store in a well-ventilated, dry place. Protect from insect damage. Keep sealed and avoid moisture and direct sunlight. During hot and humid summer months, inspect regularly to prevent insect damage and mold.
