Balloonflower Root

Chinese
桔梗
Pinyin
Jie Geng
Latin
Radix Platycodi

TCM Properties

Taste
bitter, acrid
Temperature
neutral
Channels
Lung, Stomach

Traditional Use

Primary Actions

  • Opens and disseminates Lung Qi while transforming phlegm - used for cough, wheezing, chest oppression, and copious sputum in both wind-cold and wind-heat patterns that obstruct the Lung.
  • Benefits the throat and restores the voice - classically chosen for sore throat, hoarseness, painful swallowing, and loss of voice when phlegm, wind-heat, or toxicity blocks the throat gate.
  • Expels pus and opens the Lung - a key herb for Lung abscess, throat suppuration, and toxic phlegm-heat with chest pain, fever, foul sputum, or blood-streaked expectoration.
  • Guides the actions of other herbs upward to the chest and throat - frequently included to lift clear Lung Qi, facilitate formula delivery to the upper burner, and support cases with prolapse or diarrhea when clear Yang fails to rise.

Secondary Actions

  • Used in respiratory formulas that need both diffusion and descent: it opens the Lung while companion herbs transform phlegm or clear Heat.
  • Because Jie Geng is also a traditional medicine-food root in East Asia, moderate oral use is often considered gentler than its strong upward-directing action might suggest.

Classic Formulas

  • Zhi Sou San (止嗽散) - from Yi Xue Xin Wu, where Jie Geng opens Lung Qi and helps stop lingering cough with phlegm after an external pathogen has not fully resolved.
  • Yin Qiao San (银翘散) - from Wen Bing Tiao Bian, using Jie Geng to benefit the throat and ventilate the Lung in wind-heat sore throat, fever, and early febrile disease.
  • Pu Ji Xiao Du Yin (普济消毒饮) - a classic toxin-clearing throat formula in which Jie Geng helps direct the action to the upper burner, relieving swollen painful throat and epidemic Heat-toxin presentations.

Classical References

  • ALT-NAME NOTE: Sacred Lotus lists Bai Jie Geng as an alternate market name for the standard drug Jie Geng rather than as a distinct herb. The source XLSX imported the alternate name as the primary pinyin; this record corrects the main pinyin to Jie Geng while retaining the underlying slug.
  • Shen Nong Ben Cao Jing and later materia medica traditions record Jie Geng for chest fullness, throat obstruction, and disorders where the Lung's diffusion and descent are impaired.
  • Ben Cao Gang Mu and later formula traditions emphasize Jie Geng's special upward-guiding ability, explaining why it appears in both cough formulas and formulas that direct medicinals to the throat and chest.

Modern Research

Active Compounds

  • Platycodin D (oleanane-type triterpenoid saponin) - signature expectorant and anti-inflammatory constituent of Jie Geng
  • Platycodin D3 and related platycosides (triterpenoid saponins) - contribute immunomodulatory and respiratory effects
  • Platycoside E (triterpenoid saponin precursor) - biotransforms toward more active platycodin metabolites
  • Polygalacin D (triterpenoid saponin) - studied for anti-inflammatory and metabolic activity
  • Lobetyolin (polyacetylene) - associated with anti-inflammatory and antitumor research interest
  • Platycodon polysaccharides (heteropolysaccharides) - contribute immune and metabolic support effects

Studied Effects

  • Comprehensive review literature describes anti-inflammatory, immunostimulatory, antitumor, antioxidant, antidiabetic, anti-obesity, hepatoprotective, and cardiovascular activities across extracts and isolated compounds (PMID 25666431)
  • Macrophage inflammation modulation - platycodin D and platycodin D3 altered nitric oxide production and TNF-alpha secretion in activated RAW 264.7 cells, supporting mechanistic anti-inflammatory activity (PMID 15222978)
  • Antitussive and expectorant effects - the platycoside fraction of Platycodonis Radix showed cough-suppressing and phlegm-resolving activity linked to active microbial metabolites (PMID 35245842)
  • Renal protection research - platycodin D ameliorated cisplatin-induced nephrotoxicity in mice, extending the herb's modern pharmacology beyond respiratory indications (PMID 22617354)

PubMed References

Safety & Interactions

Contraindications

  • Chronic cough due to Yin deficiency
  • Coughing or spitting blood due to Yin-deficient Fire
  • Upward-rebellious Stomach Qi with significant nausea or vomiting

Cautions

  • Excess dosage can cause nausea, vomiting, gastric irritation, sweating, or restlessness because of the herb's strongly ascending and saponin-rich nature
  • Intravenous or parenteral use is contraindicated because platycodon saponins have hemolytic activity outside the digestive tract
  • MSK page not found - drug interaction data not available from Memorial Sloan Kettering integrative medicine database

Conditions