Bitter Snake Gourd

Chinese
栝楼
Pinyin
Gua Lou
Latin
Fructus Trichosanthis

TCM Properties

Taste
sweet, bitter
Temperature
cold
Channels
Lung, Stomach, Large Intestine

Traditional Use

Primary Actions

  • Clears Heat and transforms Phlegm
  • Broadens the chest and dissipates chest obstruction
  • Moistens the intestines and promotes bowel movements
  • Disperses swellings and abscesses

Secondary Actions

  • Addresses breast abscess and lung abscess
  • Clears Phlegm-Heat from the upper burner

Classic Formulas

  • Gua Lou Xie Bai Bai Jiu Tang — foundational formula for chest bi syndrome and angina
  • Xiao Xian Xiong Tang — clears Phlegm-Heat binding in the chest with epigastric fullness
  • Gua Lou Xie Bai Ban Xia Tang — intensified formula for severe chest obstruction with Phlegm

Classical References

  • Ben Cao Gang Mu (Li Shizhen): 'Moistens Lung dryness, descends Fire, treats cough, scours away knotted Phlegm and disperses abscesses, swellings, sores, and toxins'

Modern Research

Active Compounds

  • Cucurbitacins
  • Flavonoids (isorhamnetin, kaempferol, apigenin)
  • Trichosanthes polysaccharides
  • Fatty acids (linolenic acid, oleic acid — primarily from seeds)
  • Sterols

Studied Effects

  • Multiple ribosome-inactivating proteins isolated from Trichosanthes kirilowii root and seeds; trichosanthin demonstrates anti-tumour activity (PMID 27225069)
  • Trichosanthin produced in crown gall tissue culture shows potential for choriocarcinoma treatment (PMID 16758196)
  • Trichosanthin exhibits multiple pharmacological properties including abortifacient and anti-tumour activity (PMID 8028444)

PubMed References

Safety & Interactions

Contraindications

  • Spleen deficiency with loose stools — cold, slippery nature worsens diarrhoea
  • Cold-Phlegm or Damp-Phlegm patterns
  • Classical incompatibility: do not combine with Wu Tou (Aconitum) preparations — listed in Eighteen Incompatibilities (十八反)

Cautions

  • Use with caution during pregnancy due to cold, slippery nature and potential laxative effects
  • Avoid in Stomach Cold conditions

Conditions