Tian Hua Fen (天花粉) — TCM Herb for Thirst, Lung Heat & Abscesses

At a Glance

• Herb: Tian Hua Fen
• Chinese name: 天花粉 (Tiān Huā Fěn)
• Latin name: Trichosanthis Radix
• Nature: Cold
• Taste: Bitter / Sweet
• Meridian: Lung / Stomach
• Category: Herbs that Clear Heat and Purge Fire
• Introduction: 天花粉 (Tiān Huā Fěn, Trichosanthes Root) is the dried root of Trichosanthes kirilowii or T. rosthornii, a climbing vine of the Cucurbitaceae family. The name ‘Tian Hua Fen’ (Heavenly Flower Powder) refers to the white powdery starch obtained when the root is dried and powdered, while ‘Gua Lou Gen’ (瓜蒌根) is the alternate classical name. Harvested in autumn or winter, the root is sliced and dried, yielding the characteristic white starchy powder rich in medicinal constituents.

  In TCM theory, Tian Hua Fen clears heat and generates fluids, resolves phlegm and eliminates pus. Its bitter-cold action drains heat from the lung and stomach; its sweet nature nourishes fluids and counters dryness. It is a key herb for heat-induced thirst, wasting-thirst disease (消渴, diabetes-like conditions), lung-heat cough, carbuncles, and toxic swellings.

  Trichosanthin (天花粉蛋白), a protein from the root, gained international attention in the 1970s–80s for its abortifacient and anti-HIV properties, as well as anti-tumor effects. This protein is distinct from the classical medicinal starch preparation and is used separately in clinical research.

Action

• Clears heat and generates fluids: For heat-injuring body fluids causing thirst, dry mouth, wasting-thirst.
• Clears lung heat and resolves phlegm: For lung-heat cough with dry, scanty phlegm or blood-streaked sputum.
• Eliminates pus and reduces swellings: For carbuncles, breast abscess, lung abscess — promotes pus drainage.
• Relieves toxin: Antidotal use for snake bite and arsenic poisoning (classical texts).

Clinical Application

• Clinical Application:
• Wasting-thirst / diabetes-like thirst: Combined with Ge Gen, Huang Qi, Zhi Mu (Yu Ye Tang)
• Lung-heat dry cough: With Sha Shen, Mai Dong, Sang Ye
• Stomach heat thirst: With Shi Gao, Zhi Mu, Lu Gen
• Carbuncle/breast abscess: With Zhe Bei Mu, Lian Qiao, Pu Gong Ying
• Lung abscess with pus: With Yi Yi Ren, Dong Gua Zi, Lü Gen
• Phlegm-nodules: With Xia Ku Cao, Xuan Shen
• Dosage: 10–15g in decoction. Trichosanthin injection is a separate pharmaceutical preparation.

Precautions

• Contraindicated with Wu Tou (乌头, Aconite) — classical eighteen incompatibilities (十八反). Contraindicated in pregnancy due to abortifacient risk from trichosanthin. Cold-natured: use cautiously in spleen-stomach deficiency-cold with loose stools. Trichosanthin injection can cause severe allergic reactions including anaphylaxis. Do not confuse with Gua Lou (瓜蒌, fruit).

Formula

• Yu Ye Tang (玉液汤): Huang Qi, Ge Gen, Zhi Mu, Tian Hua Fen, Wu Wei Zi, Ji Nei Jin, Shan Yao — for qi-yin deficiency wasting-thirst.
• Xian Fang Huo Ming Yin (仙方活命饮): Jin Yin Hua, Fang Feng, Bai Zhi, Tian Hua Fen, Zhe Bei Mu, Lian Qiao, Chuan Shan Jia, Zao Jiao Ci — for early-stage carbuncles and abscesses.

Combinations

• Tian Hua Fen + Ge Gen: Generates fluids, relieves thirst, clears lung-stomach heat; for wasting-thirst. Source: Yu Ye Tang (玉液汤), Yi Xue Zhong Zhong Can Xi Lu (医学衷中参西录).
• Tian Hua Fen + Zhe Bei Mu: Clears heat, dissolves phlegm, eliminates pus; for lung abscess and breast abscess. Source: Jing Yue Quan Shu (景岳全书).
• Tian Hua Fen + Lian Qiao: Clears heat-toxin, reduces swelling, disperses carbuncles; for toxic swellings. Source: Xian Fang Huo Ming Yin (仙方活命饮).
• Tian Hua Fen + Huang Qi: Generates fluids while tonifying qi; for qi-yin deficiency with thirst. Source: Yu Ye Tang (玉液汤).
• Tian Hua Fen + Zhi Mu: Clears stomach-lung heat, moistens dryness, quenches thirst; for interior heat-thirst. Source: Bai Hu Tang variations.

Pharmacological Effects

Classic Description

• Shen Nong Ben Cao Jing (《神农本草经》): ‘Governs wasting-thirst, fever with fullness and vexation, severe heat; supplements deficiency, quiets the center, and reconnects severed injuries.’
• Ben Cao Gang Mu (《本草纲目》): ‘Generates fluids and stops thirst, descends fire and moistens dryness, expels pus and reduces swelling, treats carbuncles and ulcers, and resolves toxin.’
• Ben Cao Bei Yao (《本草备要》): ‘Can recede pent-up heat in the five organs, generate fluids, and relieve thirst.’