What is Zhu Ling Tang?

Zhu Ling Tang is a roughly 1,800-year-old Chinese herbal formula composed of five ingredients: Polyporus umbellatus, Poria cocos, Alisma orientale, Talcum, and Ejiao. It was first described by Zhang Zhongjing in the Shang Han Lun (Treatise on Cold-Induced Disorders) as a traditional treatment for patterns of fluid accumulation combined with internal heat and yin deficiency. Unlike simple diuretic formulas, it is traditionally designed to drain excess fluid and clear heat while simultaneously moistening and protecting the body's own fluids.

How does Zhu Ling Tang work?

The formula is thought to work through two complementary actions: its diuretic herbs (Polyporus, Poria, Alisma, and Talcum) are traditionally understood to increase urine output and help clear heat from the urinary tract, potentially reducing burning and irritation. Ejiao, the fifth herb, is a yin-nourishing blood tonic that practitioners have long used to counterbalance the fluid-draining effect of the other four, with the intent of protecting against over-drying and supporting the mucosal lining of the urinary tract. Together, these actions are thought to address the traditional clinical picture of urinary irritation in people who also show signs of dryness or deficiency.

What forms does Zhu Ling Tang come in?

Traditional decoction (boiling the raw herbs in water) is considered most therapeutically complete. Granule extracts dissolved in hot water are the most practical modern substitute. Capsules and tablets are available but may offer slightly reduced bioavailability compared to liquid forms. Standardized Kampo preparations (Chorei-to) produced in Japan follow strict pharmacopoeia standards and are among the most rigorously tested commercial versions.

Where it comes from:

Zhu Ling Tang was recorded by the physician Zhang Zhongjing around 200 CE and became one of the foundational formulas of classical Chinese internal medicine. It was later adopted into the Japanese Kampo tradition as Chorei-to, where it is widely used in contemporary practice, particularly for urinary tract infections and bladder complaints. It remains one of the most widely prescribed herbal formulas in East Asian clinical practice today.

What does Zhu Ling Tang help with?

• Urinary tract infections (UTIs): Zhu Ling Tang has traditionally been used for urinary complaints where heat and dampness are present. Its combination of diuretic and heat-clearing herbs is thought to help flush the urinary tract while easing burning and urgency. In traditional practice, the formula is considered especially appropriate for urinary infections in people who also appear dried out or run down, where a purely draining approach might be seen as too depleting.
• Kidney stones: Practitioners have long used this formula with the aim of increasing urine volume and flow, which is thought to help dilute the urine and support the passage of small stones. Alisma and Polyporus in particular are traditionally associated with supporting fluid movement through the kidneys and bladder. This use is rooted in centuries of observational practice rather than verified clinical trials.
• Bladder irritation and burning urination: Talcum and Alisma are traditionally used to cool and soothe the lower urinary tract, and are thought to relieve the hot, painful, or uncomfortable sensation associated with bladder inflammation. Ejiao is traditionally valued for what practitioners describe as a protective, lubricating quality that may help calm irritated mucosal tissue, though this has not been confirmed in clinical studies.
• Frequent urination: Rather than simply suppressing urination, Zhu Ling Tang is traditionally understood to normalize fluid metabolism so that what practitioners describe as retained heat or damp accumulation does not drive a constant urge to urinate even when output is low. This framing is based on traditional theory rather than clinical trial evidence.
• Urinary retention: In traditional practice, when fluid is thought to accumulate in the lower body and cannot flow freely, the formula's diuretic combination is used with the aim of restoring normal downward movement of fluids, potentially relieving the sensation of fullness or incomplete emptying. Evidence for this use remains observational.
• Blood in urine (hematuria): Ejiao has a long history of traditional use to support the containment of bleeding, while the formula's heat-clearing herbs are traditionally thought to address the inflammation that may contribute to blood appearing in the urine. In Chinese medicine, this combination has traditionally been used specifically for hematuria accompanied by signs of internal heat, though no clinical trials have verified this effect.
• Recurrent UTIs: For people who experience repeated urinary infections, Zhu Ling Tang is traditionally used with the aim of addressing underlying vulnerability — understood in Chinese medicine as a combination of residual dampness, heat, and fluid deficiency — rather than treating only individual episodes. Some preliminary observational interest in this application has emerged in Japanese Kampo practice, but robust clinical evidence for reducing recurrence has not been established.
• Bladder cancer (adjunctive support): The Polyporus and Poria components contain polysaccharides that have attracted preliminary laboratory and observational interest in the context of immune support alongside conventional cancer therapy. This remains a supportive, not curative, traditional use with no verified clinical proof of efficacy, and should always be coordinated with an oncologist.
• Diarrhea with thirst and urinary difficulty: This is the classical Shang Han Lun presentation for which Zhu Ling Tang was traditionally described: a person with diarrhea, intense thirst, and reduced urination, where fluid is understood to be moving to the wrong place in the body. The formula is traditionally used to redirect fluid metabolism, promoting urinary output while easing gut urgency — a framing based entirely on historical and traditional practice.
• Insomnia with urinary symptoms: When nighttime urination disrupts sleep, or when heat and restlessness accompany urinary complaints, practitioners have traditionally combined the yin-nourishing action of Ejiao with the calming quality attributed to Poria to address both aspects together. This use is grounded in traditional theory and observational practice; it has not been validated in clinical trials.

What can Zhu Ling Tang help prevent?

• Recurrent urinary tract infections: traditionally used as a maintenance treatment with the aim of reducing the frequency of recurrent UTIs in women
• Bladder cancer recurrence (adjunctive): traditionally used in Japan as a supportive adjunct alongside standard post-surgical care for superficial bladder cancer, with the aim of reducing recurrence

Which foods are rich in Zhu Ling Tang?

1. Maitake mushroom
2. Barley water
3. Watermelon
4. Corn silk tea
5. Bone broth

Practical Tips:

Zhu Ling Tang is a multi-herb formula with no single direct food equivalent. Supportive foods are those that either mimic its diuretic heat-clearing action (barley water, watermelon, corn silk) or its nourishing protective action (bone broth, mushrooms). Avoid alcohol, spicy foods, and caffeine while using this formula, as these increase urinary tract irritation and counteract the formula's heat-clearing effects.

What are the side effects of Zhu Ling Tang?

• Mild nausea or stomach discomfort, particularly if taken on an empty stomach
• Loose stools or mild diarrhea at higher doses
• Excessive urination leading to thirst or mild dehydration if fluid intake is insufficient
• Rare allergic reactions to Ejiao (donkey-hide gelatin) in sensitive individuals
• Potential electrolyte imbalance with prolonged high-dose use, particularly in combination with diuretic medications

Good to know:

Zhu Ling Tang has a strong safety record in both classical practice and modern Japanese Kampo clinical use. Most adverse effects are mild and self-limiting. It is not recommended during pregnancy without professional guidance due to the diuretic and blood-moving components, and should be used cautiously in people with significant kidney disease.

How much Zhu Ling Tang should you take?

• Recommended daily: Traditional decoction: 9–15g of combined raw herbs decocted in water, taken in two divided doses. Granule extract (standardized): typically 3–6g per day divided into 2–3 doses. Capsule/tablet (standardized extract): follow manufacturer dosing, commonly 2–3 tablets 2–3 times daily. Japanese Kampo Chorei-to: standard adult dose is 7.5g/day of the combined granule preparation in three divided doses.
• Best time of day: Take doses spread evenly through the day — traditionally morning, midday, and evening. Avoid taking the last dose immediately before bed to minimize nighttime urination.
• With or without food: Can be taken with or without food; taking with a small amount of warm water or after a light meal reduces the chance of stomach discomfort.
• Time to effect: Acute urinary symptoms: 3–7 days. Recurrent UTI prevention or chronic urinary complaints: 4–8 weeks of consistent use.
• How long to take it: For acute UTI or urinary irritation: use for 1–2 weeks or until symptoms resolve. For recurrent UTI prevention: 3–6 months of use is supported by Kampo clinical protocols, followed by reassessment. Not recommended for indefinite unsupervised use due to diuretic load on kidneys.