Fruits and seedsQi-regulatingFructus Toosendan

Chuan Lian Zi (Toosendan Fruit)

A practical guide to Chuan Lian Zi: what it is, how Traditional Chinese Medicine uses it, the classical formulas it appears in, and who should be careful with it.

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Last reviewed Sep 25, 2026

Quick Facts

Latin NameFructus Toosendan
Chinese Name & Pinyin 川楝子 · Chuan Lian Zi
Medicinal PartFruits and seeds
The herbChuan Lian Zi is the dried ripe fruit of Melia toosendan. Ku Lian Pi is a different drug. Common forms: raw and dry-fried. Crush the fruit before decoction.
Nature and channelsBitter, cold, slightly toxic. Enters the Liver, Small Intestine, and Bladder. Bitterness drains downward. Cold clears Liver heat.
Pharmacopoeia lineSoothes the Liver and drains heat. Moves qi and relieves pain. Expels parasites. Used for Liver constraint turning to fire, distending pain in the chest, flanks, or stomach, shan-qi pain, and parasite pain.
Pattern cuesFlank distention. Bitter taste. Pulling lower-abdominal pain. Groin pain. On-and-off navel pain. Wiry, rapid pulse.
In this articleChuan Lian Zi versus Ku Lian Pi, Xiang Fu, and Yan Hu Suo. Raw versus fried. Why the dose is small. Liver caution, and who should skip it.

What Is Chuan Lian Zi?

Chuan Lian Zi (川楝子; Chuān Liàn Zǐ; Latin: Toosendan Fructus; English: Sichuan chinaberry fruit / toosendan fruit) is the dried ripe fruit of Melia toosendan Sieb. et Zucc. In Chinese medicine it is a qi-moving herb. It is bitter and cold, slightly toxic, enters the Liver, Small Intestine, and Bladder channels, and its core actions are to soothe the Liver and drain heat, move qi and relieve pain, and expel parasites. Another name is Jin Ling Zi. It is not Ku Lian Pi (chinaberry bark), which is stronger against parasites and more toxic. Do not substitute one for the other.

It is used most often for three patterns:

  • Liver constraint turning to fire — flank distention and pain, bitter taste, worse with anger
  • Shan qi / radiating lower-abdominal pain — pain that pulls through the lower abdomen or groin
  • Parasite accumulation with pain — pain around the navel that comes and goes

Raw Chuan Lian Zi is stronger at draining Liver fire. Dry-fried Chuan Lian Zi is slightly less bitter-cold and less harsh, and is used more to move qi and stop pain. The usual decoction dose is 5–10 g. A cold weak spleen and stomach, diarrhea, and known liver disease are a poor match. Because it is slightly toxic, do not take large amounts or use it for a long time. It is not a daily “Liver-soothing tea.”

When emotion constraint turns to fire, flank pain, bitter taste, and darting lower-abdominal pain are common. Chuan Lian Zi is bitter-cold and enters the Liver. It drains heat, moves stagnation, and stops pain. With Yan Hu Suo it is Jin Ling Zi San. It drains more than it tonifies. Dull pain that likes warmth and pressure is the wrong picture.

Chuan Lian Zi is not a catch-all for stress pain, and it is not a home parasite remedy. In spleen-stomach cold, damaged yin, or pain with no heat and no stagnation, using it alone can injure the stomach and burden the liver. Raw or fried should be decided by a licensed Chinese medicine practitioner after pattern diagnosis. Do not take it long-term on your own.

Chuan Lian Zi Toosendan Fruit

Chuan Lian Zi: Materia Medica Profile

Identification & Quality Standard

Fructus Toosendan

Botanical Origin

The dried mature fruit of Melia toosendan Sieb. et Zucc.(Meliaceae).

Production Regions

Primarily produced in Chinese provinces of Sichuan, Gansu, Hubei, Guizhou, Yunnan.

Quality Requirements

Superior medicinal material is large piece with golden yellow skin and yellowish-white flesh, which are full and elastic in nature.

Macroscopic Features

Fruit is sub-spherical, 2~3cm diameter. Externally golden yellow to brownish-yellow, slightly lustrous, with dark brown spots. Apex has remnants of stylus; base has indented scars of fruit stem. Outer fruit skin is leathery, with a gap between flesh, which is loose and pale yellow, sticky when water is applied. Kernel is spherical or oval, hard, with flattened ends, and 6~8 longitudinal ridges split into 6~8 locules; each locule has one long round and black-brown seed. Distinctive odor; sour and bitter taste.

Authentic Origins and Quality Identification

Historically, the Dao Di (authentic and premium) regions for this herb are Sichuan, Hubei, and Guizhou provinces.

To identify good quality:

  • Appearance: Look for plump, bright-colored fruits with a normal, distinct scent.
  • Texture: Raw Chuan Lian Zi is smooth and hard. Stir-baked Chao Chuan Lian Zi has a darker color and a crispier texture.
  • Imposters: Be careful not to confuse it with Ku Lian Zi (Chinaberry fruit), which looks very similar but has different medicinal properties.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Bitter; Cold; Slightly toxicLiverStomachSmall IntestineBladder

1. Historical Records

This herb has a long history in classical TCM texts:

  • Shen Nong Ben Cao Jing (The Divine Farmer's Materia Medica) noted its ability to treat severe heat-related illnesses, kill certain parasites, and promote healthy urination.
  • Ming Yi Bie Lu (Miscellaneous Records of Famous Physicians) recorded its use for clearing heat bound in the chest, relieving severe thirst, and regulating fluid pathways.

2. Evolution of TCM Perspectives

Over time, TCM practitioners have focused on two main strengths of this herb:

  • Clearing Liver Heat: Some doctors emphasize its ability to soothe the Liver and clear heat. It's often used for symptoms of "Liver fire," such as rib pain, a bitter taste in the mouth, and a dry throat.
  • Moving Qi and Stopping Pain: Others highlight its strong pain-relieving qualities, frequently using it for stomach pain or hernia-like pain caused by stagnant Qi.
  • Key Takeaway: Because it is very cold and bitter, doctors always pair it carefully with other herbs to prevent it from being too harsh on the body.
Chuan Lian Zi Toosendan Fruit

Core Efficacies & Traditional Applications

Traditional Functions

Soothes the liver, moves qi, relieves pain, expels worms. Apply to swelling pain of chest and abdomen, hernia pain, enterozoic abdominalgia.

1. Primary Focus: Soothing the Liver, Clearing Heat, and Relieving Pain

  • Traditional Efficacy: Chuan Lian Zi (Sichuan Pagoda Tree Fruit) is highly valued for soothing the Liver, clearing internal heat, moving Qi, and stopping pain.
  • Target Symptoms: It is primarily used for severe rib or flank pain caused by "Liver stagnation transforming into fire." This is often accompanied by a bitter taste in the mouth, dry throat, dizziness, and irritability.
  • Common Combinations: Frequently paired with Yan Hu Suo (Corydalis Rhizome) and Xiang Fu (Cyperus Rhizome) to enhance its Qi-moving and pain-relieving effects.
  • Caution: Pregnant women should use it with caution. It is highly contraindicated for individuals with Spleen and Stomach deficiency-cold, as its cold nature can further damage digestive Yang energy.

2. Secondary Focus: Killing Parasites and Treating Ringworm

  • Traditional Efficacy: It is traditionally used to eliminate parasites and treat fungal skin infections (tinea/ringworm).
  • Target Symptoms: Used internally for intestinal parasites (like roundworms and pinworms) that cause abdominal pain and malnutrition. Used externally for scalp or body ringworm.
  • Common Combinations: For intestinal parasites, it is often paired with Shi Jun Zi (Rangoon Creeper Fruit) and Bing Lang (Areca Seed). For skin conditions, it is boiled with Ku Shen (Sophora Root) and Huang Bo (Phellodendron Bark) for external washing.
  • Caution: Do not apply externally to broken skin to avoid irritation. Overdosing can lead to toxic reactions; never increase the dosage on your own.

3. Common Herb Pairs

  • Chuan Lian Zi + Yan Hu Suo: This is a classic pairing. Chuan Lian Zi clears Liver heat and moves Qi, while Yan Hu Suo invigorates the blood and stops pain. Together, they powerfully relieve rib and stomach pain caused by Liver stagnation and blood stasis. This pairing requires a professional TCM diagnosis to adjust dosages properly.
Chuan Lian Zi Toosendan Fruit

Modern Research

Modern research offers useful context, but Traditional Chinese Medicine prescribes on whole-pattern diagnosis rather than isolated compounds.

1. Key Chemical Compounds

Modern science has found that Chuan Lian Zi (Sichuan Pagoda Tree Fruit) contains several active compounds, including toosendanin, various alkaloids, and terpenes.

  • Lab Studies: Test-tube studies show it has some ability to inhibit certain bacteria and fungi.
  • Animal Studies: It appears to influence liver and gastrointestinal functions in animals. However, human clinical trials are still needed to confirm these exact benefits.

2. Modern Pharmacological Focus

Today, researchers are mainly studying this herb's potential to protect the liver (by boosting antioxidant capacity) and its possible uses for gastrointestinal diseases. (Note: Western research on this herb is still in the early stages compared to its extensive TCM history).

3. Limitations of Modern Research

While modern lab results are interesting, they have limitations:

  • Labs Aren't Real Life: What works in a petri dish or an animal doesn't always work exactly the same way in a human body.
  • Extracts vs. Whole Herbs: TCM uses the whole fruit brewed as a tea. Modern labs often test highly concentrated, isolated chemicals, which behave differently.
  • Teamwork Matters: In TCM, herbs are almost never used alone. You cannot judge the true healing power of Chuan Lian Zi (Sichuan Pagoda Tree Fruit) based on just one isolated compound.
Chuan Lian Zi Toosendan Fruit

Comparing Similar Herbs

1. Common Ground: Chuan Lian Zi vs. Mu Xiang

  • Both Chuan Lian Zi (Sichuan Pagoda Tree Fruit) and Mu Xiang (Aucklandia Root) are excellent at moving Qi and stopping pain.
  • Both can be found in formulas designed to treat stomach pain and digestive discomfort.

2. Core Differences

  • Nature and Flavor: Chuan Lian Zi is cold and bitter, making it ideal for clearing heat. Mu Xiang is warm, acrid, and bitter, making it better for warming the center and aiding digestion.
  • Clinical Focus: Chuan Lian Zi targets pain caused by "Liver fire" (heat-related). Mu Xiang excels at treating bloating, indigestion, and abdominal pain caused by Spleen and Stomach Qi stagnation (cold/sluggish digestion).
  • Energy Movement: Chuan Lian Zi descends and purges trapped Liver heat. Mu Xiang disperses and gets the digestive Qi moving again.
  • Contraindications: Avoid Chuan Lian Zi if your digestion is weak and cold. Avoid Mu Xiang if you have "Yin deficiency with active fire" (internal heat/dryness).

3. Summary of Differences

Simply put, Chuan Lian Zi is for heat-based Liver pain, while Mu Xiang is for digestive bloating and poor appetite. They cannot be used interchangeably.

Chuan Lian Zi Toosendan Fruit

Classical Formulas Containing Chuan Lian Zi

Formulas vs. Single Herbs

  • Synergy is Key: A formula is a balanced team. The healing power comes from how the herbs interact, so a single herb cannot simply replicate a full formula's effects.
  • Holistic Balance: The exact dosage and combination in a formula affect the entire body. Never try to mix or alter these formulas at home based on internet articles.

Diet & Daily Home Use

1. Home Teas or Dietary Use

Chuan Lian Zi is strictly a medicinal herb and should not be used as a regular food ingredient. However, under professional guidance, it can be used as a mild tea for minor Liver Qi stagnation and stomach pain.

  • Recipe: 3g Chuan Lian Zi, 6g Fo Shou (Finger Citron).
  • Method: Rinse both herbs, place in a cup, and brew with boiling water. Let it steep for 10-15 minutes.
  • Usage: Good for mild stomach bloating and emotional stress (Liver stagnation). Limit to 2-3 times a week.
  • Avoid: Do not drink this if you have a cold and weak digestive system.

2. Processing and Decoction Differences

Raw Chuan Lian Zi is very hard, making it difficult to extract its active compounds. It is usually stir-baked into Chao Chuan Lian Zi, which makes it crispy and easier to brew.

  • Home Brewing: Simply soak the stir-baked herb in water for about 30 minutes, then simmer on low heat for 20-30 minutes. It does not require special decoction methods (like bagging or cooking first).

3. Dosage and Usage Cycle

  • Traditional clinical dosage is generally 3 to 10 grams.
  • Do not use this herb long-term, as its cold nature can deplete your body's vital energy (Qi). Vulnerable groups must consult a doctor before use.
Chuan Lian Zi Toosendan Fruit

Contraindications & Safety Warnings

1. Unsuitable Populations

  • Digestive Weakness: Strictly avoid if you have Spleen and Stomach deficiency-cold (e.g., chronic loose stools, aversion to cold food).
  • Vulnerable Groups: Pregnant and nursing women should use with extreme caution due to potential impacts on the fetus/infant. Children and the elderly require professional dosage adjustments.
  • Organ Health: Use cautiously if you have liver or kidney impairment, as it may place stress on these organs. Do not use if allergic to the plant family.

2. Drug Interactions and Dietary Notes

Chuan Lian Zi may interact with modern pharmaceuticals. If you are taking Western medications—especially blood pressure medications or blood thinners (anticoagulants)—you must consult your doctor to prevent the herb from altering the drug's effectiveness. Always space out the intake of herbs and pharmaceuticals.

3. Adverse Reactions and Overdose Risk

Overdosing on Chuan Lian Zi can cause toxic reactions, including dizziness, severe nausea, and vomiting. If you experience persistent vomiting, difficulty breathing, sudden confusion, or severe allergic reactions, stop use immediately and seek emergency medical care.

Frequently Asked Questions About Chuan Lian Zi

What is Chuan Lian Zi? Is it the same as Ku Lian Zi or Ku Lian Pi?
Chuan Lian Zi (川楝子) is the dried ripe fruit of Melia toosendan Sieb. et Zucc. The pharmacopoeial name is Toosendan Fructus, classically from Sichuan. Ku Lian Zi is the fruit of Melia azedarach—similar in look, often more toxic, not an equivalent. Ku Lian Pi is the bark, a separate anthelmintic drug. Garden chinaberry fruit must not be swallowed as Chuan Lian Zi.
What are the TCM properties and traditional uses of Chuan Lian Zi?
According to the Chinese Pharmacopoeia, Chuan Lian Zi is bitter and cold, slightly toxic, enters the Liver, Small Intestine and Bladder channels, and acts to soothe the Liver and drain heat, move Qi to stop pain, and kill parasites. It is used for constrained Liver turning to fire with chest-flank and epigastric pain, hernia pain and worm accumulation. Bitter-cold and descending, it both spreads constrained Qi and clears Liver-channel heat, and it is one of the colder, mildly toxic Qi regulators.
What is the difference between raw and dry-fried Chuan Lian Zi?
Raw fruit is more bitter-cold and slightly toxic, historically stronger to kill parasites and more in need of caution. Dry-fried Chuan Lian Zi is fried to scorched yellow; toxicity and cold are somewhat reduced and it is preferred for moving Qi and stopping pain. Tradition: fry for pain, use raw for worms. Modern internal use is mostly short courses of the fried fruit in a formula. Home pan-frying does not guarantee detoxification and is not a reason to raise the dose.
What is the usual dosage of Chuan Lian Zi?
The pharmacopoeial internal dose is 5–10 g in decoction; topically a suitable amount of powder may be applied. Keep courses short and doses mid-to-low; do not exceed the official ceiling or take it for long. Reduce or avoid it in children, older adults and the frail. It can accumulate. Do not eat the fruits as snacks or use garden berries as a dewormer. Keep topical paste out of the mouth and off large areas of broken skin.
What are the key safety issues and contraindications?
It is slightly toxic. Contraindicated in Spleen-Stomach deficiency-cold; avoid or forbid in pregnancy and in impaired liver or kidney function. Overdose or prolonged use can cause nausea, vomiting, abdominal pain and diarrhea, and can injure the liver—toxic hepatitis in severe cases, even life-threatening. Toosendanin sits close to the line between effect and toxicity. Do not use it if there is known liver disease, jaundice or unexplained fatigue. Stop and seek care for anorexia, dark urine, yellow skin, blurred vision or marked drowsiness.
Can Chuan Lian Zi soothe the Liver and stop pain? Does it suit every flank ache?
It targets constrained Liver turning to fire: burning flank pain, bitter taste, irritability and epigastric fullness. Classically it joins Corydalis in Jin Ling Zi San. Cold dull pain that likes warmth, or dry Yin-deficiency flank pain, is the wrong pattern. The small amount in Yi Guan Jian sits on a Yin-nourishing base—do not pull it out as monotherapy. Sudden severe pain or worsening jaundice is an emergency.
Can Chuan Lian Zi treat hernia and expel parasites?
Tradition used it for heat-type or mixed hernia pain and worm accumulation. Deworming is historical; modern intestinal parasites should follow regulated anthelmintic protocols—this is not a first-line safe dewormer. Incarcerated hernia and bowel obstruction are emergencies. Topical use for tinea still needs dermatology; do not mash the fruit onto eyes or into the mouth.
How do you choose among Chuan Lian Zi, Xiang Fu, Yan Hu Suo and Qing Pi?
Chuan Lian Zi is bitter-cold and slightly toxic, specific for hot constrained Liver pain. Cyperus is neutral and a broader, safer soother of Liver Qi. Corydalis is a stronger blood-moving analgesic for cold or heat. Qing Pi breaks Qi and disperses accumulation without Toosendan’s mild toxicity, but it is still harsh. Short, hot, intense pain may justify Jin Ling Zi San; longer Liver regulation should prefer lower-toxicity movers, with a clinician deciding whether Toosendan belongs at all.
Which herbs is Chuan Lian Zi combined with? What are the representative formulas?
With Corydalis it forms Jin Ling Zi San for constrained Liver fire and pain. A small amount may enter Yi Guan Jian when Yin deficiency meets constraint. Hernia pain may join lychee seed and tangerine seed. Use it short-term, at a limited dose, inside a formula; do not stack other frankly hepatotoxic drugs, watch liver enzymes, and stop at the first warning sign.
How do you choose and store Chuan Lian Zi?
Choose round golden- to brown-yellow fruits with a sheen, a style scar at the tip, a hard shell and a woody stone on section. Fried pieces are scorched yellow. Store dry, protected from insects. Discard moldy, shriveled or anonymous “chinaberry dates.” Buy only labeled Chuan Lian Zi or dry-fried Chuan Lian Zi from a regulated supplier—never substitute Ku Lian Zi, Ku Lian Pi or garden windfalls for internal use.

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Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.

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Chuan Lian Zi (Toosendan Fruit): Soothe the Liver, Drain Heat, and Move Qi to Stop Pain