Xie Bai (薤白) — TCM Allium Bulb for Chest Bi-Syndrome & Angina

At a Glance

• Herb: Xie Bai
• Chinese name: 薤白 (Xiè Bái)
• Latin name: Allii Macrostemi Bulbus
• Nature: Warm
• Taste: Acrid / Bitter
• Meridian: Heart / Lung / Stomach / Large Intestine
• Category: Herbs that Regulate Qi
• Introduction: Xie Bai (Bulbus Allii Macrostemi) is the dried bulb of Allium macrostemon or A. chinense, small allium plants related to onions, native to eastern Asia and first recorded in the Shen Nong Ben Cao Jing. This pungent, bitter, and warm herb has a specialized and irreplaceable action: dispersing accumulated Yang Qi obstruction in the chest to treat Chest Bi-syndrome (xiong bi) — the TCM correlate of coronary artery disease with angina pectoris. Zhang Zhongjing’s Jin Gui Yao Lue places Xie Bai at the center of three foundational chest Bi formulas, reflecting its unmatched ability to penetrate Phlegm-Cold accumulation blocking chest Yang. Allicin and other organosulfur compounds contribute to cardiovascular protective, antiplatelet, and anti-inflammatory effects in modern research.

Action

• Opens chest Yang and disperses Phlegm-Cold obstruction — the primary herb for Chest Bi-syndrome
• Moves Qi downward and resolves Damp accumulation
• Relieves diarrhea and tenesmus from Damp-Qi stagnation in the Large Intestine

Clinical Application

• Chest Bi-syndrome (xiong bi) — chest pain, tightness, and oppression from Phlegm-Cold blocking chest Yang — Xie Bai’s defining indication
• Coronary heart disease with angina pectoris — the primary modern clinical application
• Chest fullness and shortness of breath from Qi-Phlegm stagnation in the Upper Burner
• Diarrhea with tenesmus and abdominal cramping from Damp-Qi in the Large Intestine

Precautions

• Dose: 5–10 g in decoction
• Contraindicated in Qi deficiency without obstruction, excess heat conditions, or dyspnea from Kidney deficiency without Phlegm-Cold
• Pungent allium nature may cause gastric irritation in sensitive patients or worsen gastric reflux — take with food
• Avoid in patients with gastroesophageal reflux disease (GERD) aggravated by pungent onion-type foods
• Organosulfur compounds may have mild anticoagulant effects — caution with concurrent anticoagulant therapy

Formula

• Gua Lou Xie Bai Bai Jiu Tang (瓜蒌薤白白酒汤) — Xie Bai + Gua Lou + Bai Jiu (white wine), the foundational formula for Phlegm-Cold chest Bi-syndrome
• Gua Lou Xie Bai Ban Xia Tang (瓜蒌薤白半夏汤) — Xie Bai + Gua Lou + Ban Xia + Bai Jiu, for more severe Phlegm-Cold chest Bi with panting and inability to lie flat
• Zhi Shi Xie Bai Gui Zhi Tang (枳实薤白桂枝汤) — Xie Bai + Zhi Shi + Gui Zhi + Hou Po + Gua Lou, for chest Bi with Qi stagnation and upper body fullness

Combinations

• Garlic Chives Bulb (薤白) + Trichosanthes Fruit (瓜蒌) + Pinellia Rhizome (半夏) → Gua Lou Xie Bai Ban Xia Tang (瓜蒌薤白半夏汤): unblock chest yang, dissolve phlegm, chest bi, coronary artery disease
• Garlic Chives Bulb (薤白) + Trichosanthes Fruit (瓜蒌) + Rice Wine (白酒) → Gua Lou Xie Bai Bai Jiu Tang (瓜蒌薤白白酒汤): unblock chest yang, move qi, mild chest bi with shortness of breath
• Garlic Chives Bulb (薤白) + Immature Bitter Orange (枳实) + Cinnamon Twig (桂枝) → Zhi Shi Xie Bai Gui Zhi Tang (枳实薤白桂枝汤): unblock chest, move qi, chest bi with fullness and cold
• Garlic Chives Bulb (薤白) + Dong Quai (当归) + White Peony Root (白芍) → move qi, harmonize blood, dysentery with tenesmus and abdominal pain
• Garlic Chives Bulb (薤白) + Costus Root (木香) + Coptis Rhizome (黄连) → move large intestine qi, clear heat, damp-heat dysentery with tenesmus

Pharmacological Effects

• Antiplatelet
  • organosulfur compounds — inhibit platelet aggregation, prevent thrombosis
• Antihyperlipidemic
  • lowers LDL, triglycerides
• Cardioprotective; anti-inflammatory; antimicrobial; antifungal; antitumor; gi motility promoter
  • relieves tenesmus in dysentery
• Prebiotic
  • fructooligosaccharides feed beneficial gut bacteria
• The classic herb for 胸痹
  • chest bi) — the Shang Han Lun/Jin Gui Yao Lue formulas 瓜蒌薤白汤 series are foundational for TCM cardiology
  • mechanism: warms and opens chest yang, disperses cold-phlegm lodged in thorax

Classic Description

• Shen Nong Ben Cao Jing: ‘Governs metal wounds and festering sores; lightens the body; eliminates hunger; resists aging.’
• Ben Cao Gang Mu: ‘Garlic Chives Bulb — pungent in flavor and warm in qi; can scatter binding and assist yang qi — hence it is an essential medicinal for chest bi with stabbing pain and dysentery with bearing-down sensation.’
• Ben Cao Bei Yao: ‘Pungent, bitter, warm, and slippery; enters the hand taiyin and yangming; assists yang and scatters binding; treats chest bi with stabbing pain, diarrhea and dysentery with bearing-down, sores and boils; scatters blood and generates flesh. Pungent in flavor and dispersing in qi — those who take it experience increased desire; it is a yang substance.’
• Ming Yi Bie Lu: ‘Eliminates cold-heat; removes water qi; warms the middle and scatters binding qi; for all sores invaded by wind-cold with water swelling — apply topically.’