Lei Gong Teng (雷公藤) — TCM Thunder God Vine for Autoimmune Arthritis

At a Glance

• Herb: Lei Gong Teng
• Chinese name: 雷公藤 (Léi Gōng Téng)
• Latin name: Tripterygii Wilfordii Radix
• Nature: Cold
• Taste: Bitter / Acrid
• Meridian: Liver / Kidney
• Category: Herbs that Expel Wind-Dampness
• Introduction: Lei Gong Teng (Radix Tripterygii Wilfordii) is the root or peeled root bark of Tripterygium wilfordii, known in the West as ‘Thunder God Vine,’ native to southeastern China and used cautiously in TCM practice. With over 1,000 modern clinical trials, triptolide and celastrol from this herb exhibit potent immunosuppressive, anti-inflammatory, and anti-tumor properties, making it one of the most pharmacologically significant yet most toxic herbs in the Chinese materia medica. Only the peeled root bark or root wood is used clinically — the leaves, flowers, and outer bark contain concentrated toxins that are potentially fatal. Its clinical use requires strict dosing, specialist supervision, and regular monitoring of hepatic, renal, and hematological function.

Action

• Dispels Wind-Damp and powerfully alleviates pain with strong anti-inflammatory action
• Kills parasites and resolves Heat-toxin
• Suppresses immune-mediated inflammation (modern application for autoimmune disease)

Clinical Application

• Severe Wind-Damp-Heat Bi-syndrome resistant to other treatments — rheumatoid arthritis, ankylosing spondylitis
• Skin conditions from Damp-Heat toxin: leprosy, eczema, psoriasis
• Autoimmune nephritis, IgA nephropathy — modern hospital clinical application
• Adjunct in certain cancer protocols under specialist supervision (experimental)

Precautions

• Dose: 1–3 g peeled root in decoction (decoct 1–2 hours); absolute maximum 4.5 g — DO NOT EXCEED
• ONLY the peeled root wood or root bark is used — leaves, flowers, and outer bark are HIGHLY TOXIC and potentially fatal
• Major toxicity: hepatotoxicity, nephrotoxicity, bone marrow suppression, gonadotoxicity causing infertility, cardiac arrhythmia
• ABSOLUTELY contraindicated in pregnancy, breastfeeding, pediatric patients
• Contraindicated in patients with pre-existing liver disease, renal impairment, or bone marrow dysfunction
• Requires regular monitoring: liver function tests, renal function, complete blood count
• This herb must not be self-prescribed — specialist supervision is mandatory

Formula

• Lei Gong Teng Pian (雷公藤片) — standardized patent tablet with triptolide content, used in hospital rheumatology for rheumatoid arthritis
• Combined with Qin Jiao and Fang Ji for severe joint inflammation with Heat and Damp
• External wash preparation — decoction applied topically for dermatological Damp-Heat conditions (avoids systemic toxicity)

Combinations

• Thunder God Vine (雷公藤) (alone, carefully dosed) → rheumatoid arthritis — potent immunosuppressive; use with caution due to high toxicity
• Thunder God Vine (雷公藤) + Licorice Root (甘草) → mitigate toxicity, treat rheumatoid arthritis with reduced side effects

Pharmacological Effects

• Potent immunosuppressive
  • triptolide — inhibits T-cell activation, NF-kB, multiple cytokines
• Anti-inflammatory
  • celastrol — strong anti-inflammatory, comparable to steroids
• Antitumor
  • triptolide — induces apoptosis in cancer cells, under clinical investigation
• Antifertility
  • suppresses sperm — reversible male contraceptive effect
• HIGHLY TOXIC: narrow therapeutic window; liver, kidney, bone marrow, reproductive toxicity; CONTRAINDICATED in pregnancy, liver/kidney disease, children; requires strict medical supervision — only use processed root bark, never leaves or flowers

Classic Description

• Ben Cao Gang Mu Shi Yi (《本草纲目拾遗》): ‘Gut-severing herb — this is Thunder God Vine; it has severe toxicity; accidental ingestion causes vomiting, diarrhea, and abdominal pain, which may be fatal; used externally to kill parasites.’
• Zhong Hua Ben Cao (《中华本草》): ‘Expels wind and eliminates dampness, activates blood and unblocks the collaterals, reduces swelling and stops pain, kills parasites and resolves toxin; treats rheumatoid arthritis, glomerulonephritis, systemic lupus erythematosus, and psoriasis.’
• Xian Dai Zhong Yao Xue (《现代中药学》): ‘Thunder God Vine has potent anti-inflammatory and immunosuppressive effects; use strictly within safe dosage range.’