How does Tian Hua Fen work to clear heat?

Tian Hua Fen works primarily through its active protein, trichosanthin, which exhibits immunomodulatory and anti-inflammatory properties. In Traditional Chinese Medicine (TCM), it functions to clear heat and generate fluids, addressing symptoms like dry cough and thirst. Research indicates trichosanthin can inhibit protein synthesis in specific cells, explaining its historical use as an abortifacient and its investigated anti-tumor potential (Evidence Level C). The polysaccharides also contribute to hypoglycemic effects, supporting metabolic health.

Does Tian Hua Fen interact with medications?

Tian Hua Fen may interact with antidiabetic drugs because its polysaccharides can lower blood sugar, potentially causing additive hypoglycemic effects (Evidence Level C). Patients taking insulin or oral hypoglycemics should monitor their glucose levels closely to avoid hypoglycemia. Additionally, due to the immunomodulatory nature of trichosanthin, caution is advised when combining this herb with immunosuppressants. Always consult a qualified healthcare provider before adding this herb to an existing medication regimen.

What is the standard dosage for Tian Hua Fen?

The standard adult dosage for Tian Hua Fen is typically 9 to 15 grams of the dried root daily, usually taken as a decoction. For concentrated extracts, a common dosage is approximately 500 mg daily (Evidence Level D/Traditional). Dosage may vary based on the specific condition, such as lung heat cough or diabetes support. Because the herb is cold in nature, it should be used with caution in those with weak digestion or Spleen deficiency.

Is Tian Hua Fen safe during pregnancy?

No, Tian Hua Fen is strictly contraindicated during pregnancy. The active compound, trichosanthin, has potent abortifacient properties and can induce uterine contractions, leading to miscarriage (Evidence Level C). Historically, it was used to terminate pregnancies, making it highly dangerous for a developing fetus. Women who are pregnant or attempting to conceive must avoid this herb entirely. It is also generally advised to avoid during lactation due to insufficient safety data.

What is Tian Hua Fen used for in TCM?

Tian Hua Fen is used in Traditional Chinese Medicine to clear heat, generate fluids, and resolve toxicity. It is commonly prescribed for "lung heat" coughs with dryness, excessive thirst, and breast abscesses (Evidence Level D/Traditional). Emerging research suggests potential benefits for blood sugar regulation in diabetes due to its polysaccharide content (Evidence Level C). Its cooling properties make it effective for inflammatory conditions, though it should be avoided by those with Spleen deficiency or "cold" patterns.

Tian Hua Fen (Trichosanthes kirilowii)

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Tian Hua Fen (Trichosanthes kirilowii) is a traditional Chinese medicinal herb used to treat respiratory, cardiovascular, and other systemic conditions [PMID:40023967, PMID:29842965].

Background

Trichosanthes kirilowii Maxim., also known as Gualou, is a perennial herbaceous vine in the Cucurbitaceae family [PMID:40023967, PMID:35801111, PMID:39035164]. Various parts of the plant, including the root tubers, seeds, fruit, and fruit peel, are utilized in traditional medicine [PMID:35925526].

Traditional uses

Used to clear heat and transform phlegm for respiratory diseases such as chronic obstructive pulmonary disease (COPD) [PMID:40023967], and to treat thoracic obstruction, angina, cardiac failure, myocardial infarction, pulmonary heart disease, and certain cerebral ischaemic diseases [PMID:29842965]. It has also been used as an abortifacient [PMID:35324675, PMID:8028444].

Active compounds

Key compounds include trichosanthin (TCS), a ribosome-inactivating protein [PMID:35324675], as well as other proteins such as karasurin, T 33, trichosanthrip, trichokirin, alpha-kirilowin, beta-kirilowin, and trichoanguin [PMID:27225069]. Other identified components include lectins [PMID:30038056], polysaccharides [PMID:41064254], and sterols such as trichosanhemiketal A and B [PMID:30343203].

Mechanism of action

Trichosanthin (TCS) acts as an rRNA N-glycosylase by hydrolyzing and depurinating A-4324 in the 28S rRNA of ribosomes [PMID:35324675]. Other mechanisms include the phosphorylation of ERK1/2 in keratinocytes to promote wound healing [PMID:36278711], activation of the Sirtuin 1 (SIRT1) pathway to attenuate muscle atrophy [PMID:41444325], and inhibition of the LOX1/NF-κB/caspase-9 signaling pathway via lectins to protect kidney tissue [PMID:30038056].

Clinical evidence

Evidence BKnee Osteoarthritis

A phase III clinical trial evaluated SKCPT (containing T. kirilowii) for non-inferiority to celecoxib in treating knee OA [PMID:39303963]

Evidence BChronic Coronary Syndrome

Tanyu Tongzhi Formula (containing T. kirilowii) was demonstrated in randomized, controlled multicenter clinical studies to extend maximum exercise duration and ameliorate TCM syndromes [PMID:40779821]

Evidence DCancer

Trichosanthin and T. kirilowii root ethanol extract have shown anti-tumor activity in vitro and in tumor-bearing mice, including effects on EGFR TKI-resistant non-small cell lung cancer cells [PMID:27225069, PMID:36004720]

Evidence DNeuropathic Pain

T. kirilowii attenuated paclitaxel-induced cold and mechanical allodynia in mice via the spinal noradrenergic system [PMID:35723335]

Evidence DConstipation

T. kirilowii polysaccharides improved gastrointestinal transit and defecation function in diphenoxylate-induced mouse models [PMID:41064254, PMID:42134502]

Safety & adverse effects

Tian Hua Fen has been identified in literature as a potential cause of herbal-induced liver injury [PMID:26357619].

Pregnancy & lactation

Tian Hua Fen has been used as an abortifacient in traditional Chinese medicine [PMID:35324675, PMID:8028444].

Evidence summary

The evidence consists primarily of preclinical in vitro and in vivo animal studies (Level D) and some clinical trials (Level B) focusing on specific herbal formulations. There is a strong focus on the protein trichosanthin and its ribosome-inactivating properties.

PubMed sources

1.PMID: 40023967 (2025) — Study on the mechanism of Trichosanthes kirilowii Maxim. against COPD based on serum chemical composition analysis, network pharmacology, and experimental study. · Phytomedicine : international journal of phytotherapy and phytopharmacology
2.PMID: 39128302 (2024) — The multi-herbal decoction SH003 alleviates LPS-induced acute lung injury by targeting inflammasome and extracellular traps in neutrophils. · Phytomedicine : international journal of phytotherapy and phytopharmacology
3.PMID: 29932034 (2019) — Clinical Use of Toxic Proteins and Peptides from Tian Hua Fen and Scorpion Venom. · Current protein & peptide science
4.PMID: 35324675 (2022) — A Sixty-Year Research and Development of Trichosanthin, a Ribosome-Inactivating Protein. · Toxins
5.PMID: 29842965

Tian Hua Fen

Sources & Citations