Gou Teng (Uncaria Vine with Hooks, the dried hooked stem-branch sections of Uncaria rhynchophylla, U. macrophylla, U. hirsuta, and related species) is one of the essential Wind-settling herbs in the TCM ping gan xi feng (calm Liver and extinguish Wind) category. Its defining botanical feature — the paired hook-like modified branches growing from the stem nodes — gave it the name Gou Teng (Hook Vine). TCM character: sweet, cool; enters Liver and Pericardium channels exclusively. Sweet moistens; cool clears Heat; light-ascending quality disperses upward. The Ben Cao Jing Shu summarises: “sweet-bitter, mildly cool, specialises in entering the Liver channel; can calm Liver-Wood, extinguish Wind-evil, clear Liver-Fire; the essential herb for treating Liver-Wind stirring internally.” Crucially, Gou Teng differs from Tian Ma — the other major Liver-Wind herb — in one important pharmacological characteristic: its active alkaloids are thermolabile and destroyed by prolonged decoction. It must always be added in the last 10–15 minutes of cooking.
I. Classical Records and TCM Properties
Five classical benchmarks:
- Shen Nong Ben Cao Jing: governs paediatric Cold-Heat, fright-epilepsy and pathogenic Qi
- Ming Yi Bie Lu: governs paediatric fright-crying, chi cong (limb contracture with Heat), Heat-congestion
- Ben Cao Gang Mu: adults — head-spinning and eye-dizziness, calm Liver-Wind, eliminate Heart-Heat; children — internal spasm-abdominal pain, promote rash eruption
- Ben Cao Jing Shu: “sweet-bitter, mildly cool; specialises in entering Liver channel; calms Liver-Wood, extinguishes Wind-evil, clears Liver-Fire; essential herb for Liver-Wind stirring internally”
- Ben Cao Gang Mu note on drug nature: “cool in nature, non-toxic; can be used long-term in light doses” — reflecting Gou Teng’s comparatively gentle character versus Ling Yang Jiao
TCM properties: Sweet, cool; enters Liver and Pericardium channels. The dual-channel entry drives the two clinical domains: Liver channel (calm Liver-Wind and Liver-Yang, settle spasm) and Pericardium channel (clear Heart-Heat producing mental agitation, Spirit-calming). The cool nature specifically addresses the Heat-driven Liver-Wind pattern most effectively — making Gou Teng the herb of choice when Liver-Wind is accompanied by Heat or Fire signs (as distinguished from deficiency-Wind or Cold-Wind which require different treatment).
Appearance and identification: Cylindrical; 2–3cm × 0.2–0.5cm. Surface: red-brown to purple-red with fine longitudinal striations, smooth and hairless. Most distinctive feature: two paired hook-like curved modified branches growing opposite each other from each node (the hooks are 1–2cm long, tapering to a sharp tip, broad at the base) — this paired-hook arrangement is the primary authenticity identification criterion. Tough and not easily broken; cross-section yellow-white with spongy pith. Faint odour; mild taste. Quality: complete hooks, purple-red colour, tough, no impurities. Authenticity note: genuine Gou Teng always has paired complete hooks at each node; adulterated material often has absent or incomplete hooks.
Processing: Primarily raw (strongest Wind-settling, Liver-calming action); can be lightly stir-fried to moderate the cool nature for Spleen-Stomach weaker patients. Critical decoction rule: add in the last 10–15 minutes only (hou xia). Prolonged boiling destroys the rhynchophylline alkaloids responsible for the antihypertensive and CNS-calming pharmacological actions. This is one of the most clinically important preparation rules in all TCM herbology.
Core chemical constituents: Rhynchophylline (gou teng jian) and isorhynchophylline — the primary pharmacological drivers; flavonoids, volatile oils, tannins, and polysaccharides.
II. Four Core Actions
1. Settle Wind and stop spasm — calm Spirit:
The primary clinical action. Calms Liver-Wind and relieves muscle spasm, convulsion, and Spirit-agitation. Target patterns: paediatric fright-Wind (high fever with convulsion, convulsive stupor, limb rigidity, locked jaw); epilepsy (adjunctive — reduces seizure frequency, addresses the Liver-Wind and Phlegm-Heat component); tetanus with limb rigidity and opisthotonus; facial nerve spasm; adult restlessness and agitation from Liver-Fire harassing the Pericardium. Modern pharmacology: rhynchophylline inhibits CNS excitability, produces anticonvulsant effects, and relaxes muscles — directly corresponding to this classical action. Pairs with Tian Ma, Fang Feng, Chan Tui, Quan Xie, and Jiang Can (Gou Teng Yin framework).
2. Clear Heat and calm Liver — relieve headache and dizziness:
Clears Liver-Fire and calms ascending Liver-Yang; improves headache, dizziness, flushed face and red eyes, ear ringing and deafness, irritability and easy anger from Liver-Fire uprising or Liver-Yang hyperfloating. This is the primary action for Gou Teng’s use in hypertension: ascending Liver-Yang from Liver-Kidney Yin deficiency or Liver-Fire excess produces exactly the pattern of hypertension with dizziness, head pain, flushed face, irritability, and disturbed sleep. Pairs with Tian Ma + Shi Jue Ming (Tian Ma Gou Teng Yin framework) — the most widely prescribed formula for hypertension-pattern head pain and dizziness in East Asian medicine.
3. Reduce blood pressure and protect blood vessels:
Rhynchophylline dilates blood vessels, reduces vascular resistance, and lowers blood pressure; also regulates vascular tone and improves microcirculation. This constitutes the direct molecular basis for action 2 — the antihypertensive pharmacology and the classical qing re ping gan (clear Heat and calm Liver) action are the same phenomenon described in different frameworks. Also relieves hypertension-related numbness of the limbs, headache, and dizziness. Adjunctive (not replacement) for hypertension management.
4. Clear Heat and promote rash eruption:
Cool nature clears Heat; assists incomplete measles rash eruption in children; adjunctive for skin itching from Wind-rash; relieves skin redness and itching. This is the mildest and least frequently utilised of the four actions clinically — Chan Tui and Bo He are generally stronger for this indication. Gou Teng is used for this when the patient also has Liver-Wind or Liver-Heat signs.
III. Four Classical Formulas
1. Gou Teng Yin “Uncaria Drink” (Xiao Er Yao Zheng Zhi Jue)
Composition: Gou Teng · Tian Ma · Fang Feng · Chan Tui · Ren Shen · Quan Xie · Jiang Can · Gan Cao. Action: settle Wind and stop spasm, clear Heat and calm Spirit, supplement Qi and support constitutional Qi. Indication: paediatric fright-Wind, high fever with convulsion, restlessness, limb spasm; especially appropriate for constitutionally deficient children with fright-Wind. Gou Teng’s role: primary Wind-settling and Heat-clearing agent; Ren Shen prevents the Wind-settling and Heat-clearing herbs from depleting constitutional Qi.
2. Tian Ma Gou Teng Yin “Gastrodia-Uncaria Drink” (Za Bing Zheng Zhi Xin Yi)
Composition: Gou Teng (add last) · Tian Ma · Shi Jue Ming · Shan Zhi · Huang Qin · Chuan Niu Xi · Du Zhong · Sang Ji Sheng · Yi Mu Cao · Ye Jiao Teng · Fu Shen. Action: calm Liver and extinguish Wind, clear Heat and activate Blood, supplement Liver-Kidney. Indication: Liver-Yang uprising and Liver-Wind agitation — head pain and dizziness, ear ringing and deafness, restless insomnia, limb numbness; applicable to hypertension, migraine, insufficient cerebral blood supply, and post-stroke sequelae. This is the most important and widely used formula containing Gou Teng in modern East Asian clinical practice. Gou Teng + Tian Ma + Shi Jue Ming is the Wind-settling three-herb core; Chuan Niu Xi guides downward; Du Zhong and Sang Ji Sheng supplement Liver-Kidney Yin (the deficiency root).
3. Ling Jiao Gou Teng Tang “Antelope-Uncaria Decoction” (Tong Su Shang Han Lun)
Composition: (Ling Yang Jiao or Tian Ma substituted) · Gou Teng · Sang Ye · Ju Hua · Chuan Bei Mu · Sheng Di · Bai Shao · Fu Shen · Zhu Ru · Gan Cao. Action: cool Liver and extinguish Wind, augment fluids and relax sinew. Indication: Heat generating Wind with Liver-Yang uprising — high fever with convulsion, convulsive stupor, head pain and dizziness; Tian Ma is widely used as the Ling Yang Jiao substitute for both conservation and cost reasons. Gou Teng’s role: amplifies Wind-settling and Heat-clearing alongside the other cooling herbs.
4. Gou Teng San “Uncaria Powder” (Tai Ping Sheng Hui Fang)
Composition: Gou Teng · Tian Ma · Chuan Xiong · Bai Zhi · Fang Feng · Xi Xin. Action: calm Liver and extinguish Wind, dispel Wind and stop pain. Indication: Liver-Wind uprising with exterior Wind-evil — headache, dizziness, limb numbness, joint pain. Gou Teng + Tian Ma handle the interior Liver-Wind; Chuan Xiong, Bai Zhi, Fang Feng, Xi Xin handle the exterior Wind-Cold component — a dual interior-exterior Wind formula.
IV. Four-Herb Differential
| Herb | Nature | Core emphasis | Unique advantage | Cannot do |
|---|---|---|---|---|
| Gou Teng | Sweet, cool | Clear Heat + calm Liver + settle Wind; antihypertensive strongest in the group | Heat-type Liver-Wind; antihypertensive documented; paediatric-safe; affordable; can be used long-term | Dispel exterior Wind-Cold; channel-unblocking for limb numbness as broadly as Tian Ma; Phlegm-dissolving |
| Tian Ma | Sweet, neutral | Settle Wind + calm Liver + unblock channels; broadest Wind-pattern applicability | Applicable to ALL Wind patterns regardless of thermal character (neutral — no thermal bias); also unblocks channels for limb numbness and bi-syndrome | Clear Heat as strongly as Gou Teng; antihypertensive not as specifically documented |
| Ling Yang Jiao (Antelope horn) | Salty, cold | Clear Heat + detoxify + settle Wind + sedate Spirit; emergency-level force | Strongest acute emergency Wind-settling; high fever crisis and convulsive stupor | Affordable; long-term use; antihypertensive; conservation-protected species; Gou Teng or Tian Ma widely used as substitute |
| Jiang Can (Silkworm) | Salty-pungent, neutral | Dispel Wind + dissolve Phlegm + settle Wind + stop spasm + scatter nodules | Phlegm-Heat disturbing Spirit; invigorated inward pattern; also dissolves Phlegm-nodes and stops pain from Wind-Phlegm obstruction | Clear Heat as substantially; antihypertensive; rash-promoting |
| Ju Hua (Chrysanthemum) | Sweet-bitter, mildly cold | Clear Heat + calm Liver + benefit eyes; stronger head-eye clearing | Eye redness and photophobia; head-Wind headache strongest; also dispels exterior Wind-Heat | Settle Wind-spasm; antihypertensive specifically; paediatric fright-Wind |
V. Modern Pharmacology
Core chemical constituents: Rhynchophylline and isorhynchophylline (primary pharmacological drivers; thermolabile — destroyed by prolonged boiling); flavonoids, volatile oils, tannins, polysaccharides.
- Sedative and anticonvulsant: inhibits CNS excitability; relaxes muscle; suppresses convulsion; no significant toxicity or side effects; suitable for paediatric use
- Antihypertensive: dilates blood vessels; reduces vascular resistance; lowers blood pressure; adjunctive in primary and secondary hypertension; relieves hypertension-related headache and dizziness
- Anti-inflammatory and antioxidant: inhibits inflammatory responses; scavenges free radicals; protects vascular endothelium; delays vascular ageing; adjunctive in atherosclerosis prevention
- Improve cerebral circulation: dilates cerebral blood vessels; improves cerebral blood supply; adjunctive in post-stroke sequelae and memory decline
- Regulate heart rhythm: regulates cardiac rhythm; relieves arrhythmia; adjunctive cardiac protective action
Modern clinical applications: Cardiovascular (hypertension, atherosclerosis, coronary artery disease, arrhythmia; common in Gou Teng Jiang Ya Pian and Tian Ma Gou Teng Ke Li patent medicines); neurological (paediatric convulsion, epilepsy, nervous exhaustion, insomnia, post-stroke sequelae, limb numbness); paediatrics (high fever with convulsion, nocturnal fright-crying, incomplete measles rash, Wind-rash itching); daily wellness (Gou Teng tea for hypertension, head pain, and agitation; served cool temperature to preserve alkaloid content).
VI. Dosage and Safety
Dosage: decoction 3–12g (add in final 10–15 minutes — mandatory); powder 1–2g twice daily; tea 3–5g per serving, once daily.
CRITICAL preparation rule: Hou xia (add last). Add Gou Teng only in the final 10–15 minutes of decoction. Prolonged boiling destroys rhynchophylline and isorhynchophylline — the herbs’ primary active alkaloids — eliminating the antihypertensive and anticonvulsant actions. This is the most clinically consequential preparation instruction for Gou Teng and must never be omitted.
Authenticity verification: genuine Gou Teng always has complete paired hooks at each node; adulterated material often has absent or incomplete hooks; colour should be purple-red rather than dull brown.
Contraindications:
- Spleen-Stomach deficiency-Cold (cold-aversion, loose stool, abdominal pain): cool nature worsens interior Cold accumulation; may worsen abdominal pain and diarrhoea; use with caution; prefer lightly stir-fried form
- Hypotension (low blood pressure): significant antihypertensive action; low blood pressure patients may worsen dizziness, fatigue, and palpitations; contraindicated
- Pregnancy: mild Wind-settling and Blood-activating actions; use only under TCM physician guidance; not for self-administration
- Infants: under TCM physician supervision with appropriate dose reduction; avoid excessive cold-natured herb use
- During treatment diet: avoid raw-cold and oily foods; Spleen-Stomach weak patients prefer stir-fried form
