Dong Ling Cao (Isodon rubescens): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Dong Ling Cao work against cancer cells?

Dong Ling Cao contains active compounds called oridonin and ponicidin, which laboratory research suggests may induce apoptosis (programmed cell death) in cancer cells and inhibit tumor proliferation. These diterpenoids appear to affect multiple cellular signaling pathways involved in cancer cell survival and growth. However, current evidence comes primarily from in vitro and animal studies (Evidence Level C), with limited human clinical data. More research is needed to confirm these mechanisms in humans.

Can I take Dong Ling Cao with immunosuppressant medications?

Dong Ling Cao should not be taken with immunosuppressant medications. The herb demonstrates immunomodulatory properties that may counteract the effects of drugs prescribed after organ transplants or for autoimmune conditions. This combination could potentially reduce medication effectiveness or cause unpredictable immune responses. Patients on immunosuppressant therapy should avoid Dong Ling Cao and consult their healthcare provider before using any herbal supplements.

What is the recommended dosage for Dong Ling Cao?

Traditional Chinese medicine practitioners typically prescribe 9-15 grams of dried Dong Ling Cao herb daily as a decoction. Standardized extracts are commonly dosed at approximately 500mg twice daily. However, optimal therapeutic dosing has not been established through clinical trials (Evidence Level C). Dosage should be individualized based on the condition being addressed and supervised by a qualified practitioner familiar with Chinese herbal medicine.

Is Dong Ling Cao safe during pregnancy?

No, Dong Ling Cao is considered unsafe during pregnancy and is contraindicated. The herb contains oridonin and other diterpenoid compounds that may stimulate uterine contractions and potentially affect fetal development. Traditional Chinese medicine sources explicitly warn against its use in pregnant women. Women who are pregnant, planning pregnancy, or breastfeeding should avoid Dong Ling Cao entirely and consult a healthcare provider for safe alternatives.

What is Dong Ling Cao used for in traditional Chinese medicine?

Dong Ling Cao has been traditionally used in Chinese folk medicine for treating throat inflammation, digestive conditions, and bacterial infections. It was valued for its heat-clearing and toxin-removing properties. Modern research has generated interest in its potential anticancer applications, particularly for throat and digestive system malignancies. However, clinical evidence supporting these traditional uses remains limited (Evidence Level C), and applications have not been fully validated in human trials.

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 28 PubMed articles · model: gemma4:31b

Summary

Dong Ling Cao (Isodon rubescens/Rabdosia rubescens) is a traditional Chinese medicinal herb known for its anti-inflammatory and anti-tumor properties [PMID:39631716, PMID:35401233].

Background

Isodon rubescens (also known as Rabdosia rubescens) is a medicinal and food plant used in traditional Chinese medicine [PMID:35401233, PMID:36479509].

Traditional uses

It has been used for decades to treat sore throats, tonsillitis, colds, headaches, bronchitis, chronic hepatitis, joint rheumatism, snake and insect bites, and various cancers [PMID:35401233, PMID:39388604].

Active compounds

The plant contains terpenoids, flavonoids, polyphenols, alkaloids, amino acids, and volatile oils, with diterpenoids being the most abundant bioactive components [PMID:35401233]. Key compounds include oridonin (a tetracyclic ent-kaurane diterpenoid) [PMID:29959312, PMID:26389430], ponicidin [PMID:40107635], and various other ent-kaurane diterpenoids such as isojiangrubesins A-G [PMID:28869908] and lushanrubescensin [PMID:39388604].

Mechanism of action

Oridonin acts as a covalent inhibitor of the NLRP3 inflammasome by bonding with cysteine 279 to block the interaction between NLRP3 and NEK7 [PMID:29959312]. Other mechanisms include the modulation of autophagy [PMID:26999089], targeting the PI3K/AKT/mTOR pathway in esophageal squamous cell carcinoma [PMID:41966342], and regulating macrophage polarization from a pro-inflammatory M1 phenotype to an anti-inflammatory M2 phenotype [PMID:41328058].

Clinical evidence

Evidence BGingivitis

Evaluated for efficacy in a multi-center, randomized, double-blind trial comparing different dosage forms [PMID:19821105]

Evidence DAlcohol-induced liver damage

Reduced liver damage in mice by inhibiting CYP7A1 expression and inducing autophagy [PMID:41079251]

Evidence DEsophageal Squamous Cell Carcinoma (ESCC)

Aqueous extract inhibits ESCC by targeting the PI3K/AKT/mTOR pathway [PMID:41966342]; oridonin combined with cisplatin synergistically inhibits cell proliferation, migration, and invasion [PMID:40250733]

Evidence DHepatocellular Carcinoma (HCC)

Ponicidin was identified as a compound that suppresses HCC cell proliferation and migration by modulating CHPF2 [PMID:40107635]

Safety & adverse effects

Oridonin is noted to have unfavorable pharmacokinetic properties, including poor aqueous solubility and limited bioavailability [PMID:41328058, PMID:31947574].

Drug interactions

Oridonin combined with cisplatin was found to synergistically induce apoptosis in esophageal squamous cell carcinoma cells [PMID:40250733].

Evidence summary

The evidence consists primarily of in vitro and in vivo animal studies (Level D) and comprehensive reviews (Level C), with one randomized controlled trial for gingivitis (Level B). Most data focus on the compound oridonin.

PubMed sources

1.PMID: 29959312 (2018) — Oridonin is a covalent NLRP3 inhibitor with strong anti-inflammasome activity. · Nature communications
2.PMID: 40107635 (2025) — CHPF2 as a novel biomarker and ponicidin as a potential therapeutic agent in hepatocellular carcinoma. · Pharmacological research
3.PMID: 26389430 (2002) — Oridonin alleviates SiNPs-induced pulmonary fibrosis by inhibiting pyroptosis via IRE1α-XBP1s-NLRP3 pathway. · International immunopharmacology
4.PMID: 26389352 (2002) — Cytotoxic ent-Kaurane Diterpenoids from Rabdosia Rubescens. · Chemistry & biodiversity
5.PMID: 35401233 (2022) — Isodon rubescens (Hemls.) Hara.: A Comprehensive Review on Traditional Uses, Phytochemistry, and Pharmacological Activities. · Frontiers in pharmacology

Dong Ling Cao

Sources & Citations

Calculate a safe dose of Dong Ling Cao