Formula Pill (Wan)

Kang Ning Wan

Curing Pills · 康寧丸

Also known as: Kang Ning Wan, Curing Pills, Healthy Peaceful Pills,

A popular all-purpose digestive remedy used for sudden stomach upset, nausea, vomiting, bloating, diarrhea, and other acute digestive problems. It works by clearing excess Dampness from the digestive system, helping break down stagnant food, and relieving associated headache and dizziness. One of the most widely used household remedies in Chinese medicine, often kept on hand for travel, food poisoning, overeating, or stomach flu.

Origin Traditional Guangdong folk formula (民间验方); no single classical text attribution — Unknown; traditional folk formula from Southern China, widely popularized as a patent medicine
Composition 15 herbs
Huo Xiang
King
Huo Xiang
Cang Zhu
Deputy
Cang Zhu
Hou Pu
Deputy
Hou Pu
Fu Ling
Deputy
Fu Ling
Yi Yi Ren
Assistant
Yi Yi Ren
Mu Xiang
Assistant
Mu Xiang
Ge Gen
Assistant
Ge Gen
Bai Zhi
Assistant
Bai Zhi
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Educational content Consult qualified TCM practitioners for diagnosis and treatment

Patterns Addressed

In TCM, symptoms don't appear randomly — they cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Kang Ning Wan is designed to correct these specific patterns.

Why Kang Ning Wan addresses this pattern

When Dampness accumulates in the Spleen and Stomach, it impairs their ability to transform food and fluids, leading to nausea, bloating, heavy sensation in the body, and loose stools. Kang Ning Wan directly targets this with a multi-layered approach: Huo Xiang and Cang Zhu aromatically transform and dry Dampness; Fu Ling and Yi Yi Ren drain it downward through urination; Hou Po and Mu Xiang move Qi to prevent further Dampness accumulation. This comprehensive strategy restores the Spleen's transportive function and the Stomach's descending function.

A practitioner would look for one or more of these signs

Nausea

Sudden onset, often with a heavy, oppressive feeling in the stomach

Abdominal Pain

Fullness and distension in the upper abdomen

Diarrhea

Loose, watery stools

Loss Of Appetite

No desire to eat, food feels unappealing

Epigastric Fullness And Pain Relieved By Vomiting

May accompany nausea in acute cases

Commonly Prescribed For

These conditions can arise from the patterns above. A practitioner would consider Kang Ning Wan when these conditions are specifically caused by those patterns — not for all cases of these conditions.

TCM Interpretation

In TCM, acute gastroenteritis is understood as a disruption of the Spleen and Stomach's normal functions, most often caused by Dampness invading the Middle Burner. This can happen when contaminated food or drink introduces turbid Dampness, or when external pathogenic factors (especially in summer) combine with internal Dampness from dietary excess. The Spleen loses its ability to transform and transport, so fluids accumulate and food stagnates, producing nausea, vomiting, and watery diarrhea. The Stomach's Qi, which should descend, instead rebels upward, causing vomiting.

Why Kang Ning Wan Helps

Kang Ning Wan is particularly well-suited for acute gastroenteritis because it addresses all the key mechanisms at once. Huo Xiang, the lead herb, aromatically revives the Spleen and stops vomiting. Fu Ling, Yi Yi Ren, and Cang Zhu drain and dry the excess Dampness. Hou Po and Mu Xiang restore normal Qi movement to relieve abdominal distension and pain. When there is an exterior component with chills and body aches, Bai Zhi and Ge Gen address this layer. The formula works quickly for acute symptoms, which is why it has become one of the most popular first-aid digestive remedies throughout China and in TCM practice worldwide.

Also commonly used for

Food Poisoning

Mild to moderate cases with nausea, vomiting, and abdominal cramping

Nausea

Acute onset from dietary irregularity or external factors

Indigestion

From overeating, greasy foods, or alcohol

Abdominal Pain

Fullness and distension after eating

Diarrhea

Acute watery or loose stools

Hangover

Nausea, headache, and digestive upset from excess alcohol

Irritable Bowel Syndrome

Acute flares with predominantly diarrhea and bloating

What This Formula Does

Every TCM formula has a specific set of actions — here's what Kang Ning Wan does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Kang Ning Wan is primarily used to support these areas of health:

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Kang Ning Wan performs to restore balance in the body:

How It Addresses the Root Cause

TCM doesn't just suppress symptoms — it aims to resolve the underlying imbalance. Here's how Kang Ning Wan works at the root level.

This formula addresses a common pattern in which external Wind-Cold or Wind-Dampness invades the body while Dampness and food stagnation accumulate in the middle burner (the Stomach and Spleen system). This often happens during humid weather, after travel, or following dietary indiscretion such as overeating, consuming unfamiliar food, or drinking too much alcohol.

When external pathogenic factors (such as Wind-Cold) combine with internal Dampness, the Spleen's ability to transform and transport food and fluids becomes impaired. Food sits in the Stomach instead of being properly processed, creating stagnation. Dampness, which is heavy and turbid by nature, further clogs the middle burner, causing the Stomach Qi to rebel upward (leading to nausea and vomiting) or to rush downward inappropriately (causing diarrhea). The combination of exterior invasion and interior Dampness-stagnation produces the characteristic picture of this pattern: headache and body aches from the exterior attack, plus nausea, vomiting, abdominal distension, and diarrhea from the interior disruption.

The formula works by simultaneously releasing the exterior pathogen through aromatic, acrid herbs, transforming interior Dampness through drying and draining mechanisms, and dispersing food stagnation to restore normal digestive Qi flow. Tian Hua Fen (Trichosanthes root) is included to protect fluids from being overly damaged by the drying herbs, while Ju Hua (Chrysanthemum) and Gou Teng (Uncaria vine) help clear Wind-Heat that may rise to the head, addressing headache and dizziness.

Formula Properties

Every formula has an inherent temperature, taste, and affinity for specific organs — these properties determine how it interacts with the body

Overall Temperature

Slightly Warm

Taste Profile

Predominantly acrid and aromatic with bitter undertones. The acrid taste disperses and moves Qi, the aromatic quality transforms Dampness, and the bitter flavor dries Dampness and directs Qi downward.

Ingredients

15 herbs

The herbs that make up Kang Ning Wan, organized by their role in the prescription

King — Main ingredient driving the formula
Deputy — Assists and enhances the King
Assistant — Supports or moderates other herbs
Envoy — Directs the formula to its target
King — Main ingredient driving the formula
Huo Xiang

Huo Xiang

Korean mint

Dosage 6 - 9g
Temperature Warm
Taste Pungent
Organ Affinity Lungs, Spleen, Stomach

Role in Kang Ning Wan

The chief aromatic herb in the formula, Huo Xiang aromatically transforms Dampness, harmonizes the Middle Burner, stops vomiting, and releases mild exterior patterns. It directly addresses the core pathomechanism of Dampness obstructing the Spleen and Stomach.
Deputies — Assists and enhances the King
Cang Zhu

Cang Zhu

Black atractylodes rhizomes

Dosage 6 - 9g
Temperature Warm
Taste Bitter, Pungent
Organ Affinity Spleen, Stomach
Preparation Bran-fried (fu chao)

Role in Kang Ning Wan

Strongly dries Dampness and strengthens the Spleen's transportive function. Works alongside Huo Xiang to powerfully resolve Dampness from the Middle Burner.
Hou Pu

Hou Pu

Houpu Magnolia bark

Dosage 3 - 6g
Temperature Warm
Taste Bitter, Pungent
Organ Affinity Lungs, Spleen, Stomach

Role in Kang Ning Wan

Moves Qi, dries Dampness, and relieves distension in the abdomen. Its Qi-moving action helps transform stagnant food and Dampness in the Stomach and intestines.
Fu Ling

Fu Ling

Poria-cocos mushrooms

Dosage 9 - 15g
Temperature Neutral
Taste Sweet
Organ Affinity Heart, Kidneys, Lungs, Spleen

Role in Kang Ning Wan

The largest ingredient by proportion, Fu Ling strengthens the Spleen and promotes urination to drain Dampness downward. It supports the Spleen's ability to transform and transport fluids.
Assistants — Supports or moderates other herbs
Yi Yi Ren

Yi Yi Ren

Job's tears

Dosage 6 - 9g
Temperature Cool
Taste Sweet
Organ Affinity Lungs, Spleen, Stomach

Role in Kang Ning Wan

Strengthens the Spleen, promotes urination, and drains Dampness. Complements Fu Ling in resolving Dampness through the urinary pathway while gently supporting digestion.
Mu Xiang

Mu Xiang

Costus roots

Dosage 3 - 6g
Temperature Warm
Taste Bitter, Pungent
Organ Affinity Gallbladder, Large Intestine, Liver, Lungs, Spleen, Stomach

Role in Kang Ning Wan

Promotes the movement of Qi in the Spleen and Stomach, relieves pain and distension. Prevents the heavy Dampness-draining herbs from causing Qi stagnation.
Ge Gen

Ge Gen

Kudzu roots

Dosage 6 - 9g
Temperature Cool
Taste Pungent, Sweet
Organ Affinity Spleen, Stomach

Role in Kang Ning Wan

Releases the exterior, raises clear Yang Qi of the Spleen and Stomach, and generates fluids. Helps relieve diarrhea by raising the clear and addresses mild exterior symptoms that may accompany digestive upset.
Bai Zhi

Bai Zhi

Angelica roots

Dosage 3 - 6g
Temperature Warm
Taste Pungent
Organ Affinity Spleen, Stomach, Lungs

Role in Kang Ning Wan

Disperses Wind-Cold, opens the nasal passages, and reduces Dampness. Supports the formula's ability to address headache and exterior symptoms accompanying digestive complaints.
Shen Qu

Shen Qu

Medicated leaven

Dosage 6 - 9g
Temperature Warm
Taste Pungent, Sweet
Organ Affinity Spleen, Stomach
Preparation Stir-fried (chao)

Role in Kang Ning Wan

A fermented preparation that directly reduces food stagnation, harmonizes the Stomach, and promotes digestion. Particularly effective for stagnation from starchy foods and alcohol.
Gu Ya

Gu Ya

Millet sprout

Dosage 6 - 9g
Temperature Neutral
Taste Sweet
Organ Affinity Spleen, Stomach
Preparation Stir-fried (chao)

Role in Kang Ning Wan

Germinated rice that aids digestion and reduces food stagnation, particularly from grains and starches. Works with Shen Qu to address food accumulation.
Tian Hua Fen

Tian Hua Fen

Snake gourd roots

Dosage 3 - 6g
Temperature Cold
Taste Bitter, Sour, Sweet
Organ Affinity Stomach, Lungs

Role in Kang Ning Wan

Clears Heat, generates fluids, and resolves Phlegm. Provides a cooling, moistening balance to the many warm, drying herbs in the formula, and helps address thirst associated with digestive upset.
Ju Hua

Ju Hua

Chrysanthemum flowers

Dosage 3 - 6g
Temperature Cool
Taste Bitter, Sweet
Organ Affinity Liver, Lungs

Role in Kang Ning Wan

Disperses Wind-Heat, clears the head, and calms the Liver. Addresses headache, dizziness, and any Heat component in the pattern, particularly when digestive upset is accompanied by a heavy or dizzy head.
Tian Ma

Tian Ma

Gastrodia rhizomes

Dosage 3 - 6g
Temperature Neutral
Taste Sweet
Organ Affinity Liver

Role in Kang Ning Wan

Calms Liver Wind and relieves dizziness and headache. Addresses vertigo and nausea that may accompany gastrointestinal disturbance, including motion sickness.
Ju Hong

Ju Hong

Red Tangerine Peel

Dosage 3 - 6g
Temperature Warm
Taste Bitter, Pungent
Organ Affinity Spleen, Lungs

Role in Kang Ning Wan

The red outer peel of tangerine regulates Qi, dries Dampness, and transforms Phlegm. Helps relieve nausea, belching, and abdominal bloating.
Envoy — Directs the formula to its target
Bo He

Bo He

Wild mint

Dosage 3 - 6g
Temperature Cool
Taste Pungent
Organ Affinity Liver, Lungs
Preparation Added in last 5 minutes (hou xia)

Role in Kang Ning Wan

A light, aromatic mint that disperses Wind-Heat from the head, soothes the Liver, and helps direct the formula upward to relieve headache and nausea. Its aromatic quality also aids the transformation of Dampness.

Why This Combination Works

How the herbs in Kang Ning Wan complement each other

Overall strategy

Kang Ning Wan addresses acute digestive disturbance caused by Dampness obstructing the Middle Burner, often complicated by food stagnation and mild exterior Wind invasion. The formula combines aromatic Dampness-transforming herbs with Qi-regulating, food-dispersing, and Wind-releasing ingredients to restore normal Stomach and Spleen function.

King herbs

Huo Xiang (Patchouli) is the primary aromatic herb that transforms Dampness in the Middle Burner while harmonizing the Stomach and stopping vomiting. Its aromatic, warm nature directly revives the Spleen's ability to transform fluids, making it the ideal lead herb for acute dampness-related digestive complaints.

Deputy herbs

Fu Ling strengthens the Spleen and drains Dampness downward through urination, addressing the root of fluid accumulation. Cang Zhu powerfully dries Dampness and restores the Spleen's transportive function. Hou Po moves Qi and eliminates abdominal distension, working with the aromatic herbs to open up the stagnant Middle Burner.

Assistant herbs

The formula contains several functional groups of assistants. Shen Qu and Gu Ya directly reduce food stagnation (reinforcing assistants). Mu Xiang and Ju Hong regulate Qi flow to prevent stagnation from the Dampness-resolving herbs. Ge Gen and Bai Zhi release the exterior and address headache or mild Wind-Cold symptoms that often accompany digestive upset (counteracting assistants). Tian Ma and Ju Hua address dizziness, vertigo, and headache. Tian Hua Fen provides a cooling, fluid-generating counterbalance to the many warm, drying herbs (restraining assistant), and Yi Yi Ren supports Dampness drainage while gently strengthening the Spleen.

Envoy herbs

Bo He directs the formula's action upward to address nausea, headache, and head heaviness. Its light, dispersing nature helps vent turbid Dampness and guides the aromatic herbs to where they are needed.

Notable synergies

Huo Xiang and Cang Zhu together form a powerful Dampness-transforming pair that works from the aromatic and bitter-drying angles simultaneously. Shen Qu and Gu Ya together cover a broad range of food stagnation types. Fu Ling and Yi Yi Ren drain Dampness through the urinary route while Hou Po and Mu Xiang move it through Qi regulation, creating a comprehensive Dampness-resolution strategy.

How to Prepare

Traditional preparation instructions for Kang Ning Wan

Kang Ning Wan is traditionally prepared as small pills (wan). The herbs are ground into fine powder and formed into small black pills using water and activated carbon as binding agents. The standard dosage for the pill form is 1 to 2 vials (sachets) taken 2 to 3 times daily with warm water, ideally before meals or at the onset of symptoms.

When prepared as a decoction (tang), combine the herbs with approximately 600 ml of water. Bring to a boil, then simmer for 20 to 25 minutes. Bo He (mint) should be added in the last 5 minutes of cooking to preserve its volatile aromatic oils. Strain and drink warm, divided into 2 to 3 doses per day.

Common Modifications

How practitioners adapt Kang Ning Wan for specific situations

Added
Ban Xia

9g, strongly descends Stomach Qi and stops vomiting

Sheng Jiang

6g, warms the Stomach and enhances the anti-nausea effect

Ban Xia is the foremost herb for directing rebellious Stomach Qi downward, and paired with Sheng Jiang it becomes a classical anti-emetic combination that amplifies the formula's ability to stop vomiting.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herbal formula.

Contraindications

Situations where Kang Ning Wan should not be used or requires extra caution

Avoid

Pregnancy. The formula contains aromatic, Qi-moving herbs (Hou Po, Mu Xiang, Bo He) that may stimulate uterine activity. Bao Ji Wan product labeling in China lists pregnancy as a contraindication.

Caution

Yin deficiency with Heat or constitutional dryness. The formula is predominantly warm and aromatic, which can further injure Yin fluids in those who are already Yin-deficient. Signs would include dry mouth, night sweats, a red tongue with little coating, and a thin rapid pulse.

Caution

Severe dehydration with fluid depletion. Although Tian Hua Fen (Trichosanthes root) provides some fluid-protective effect, the overall drying and aromatic nature of this formula can worsen dehydration if fluid loss is already severe.

Caution

Gluten allergy or celiac disease. The ingredient Shen Qu (Massa fermenta) is processed with wheat and may contain gluten proteins.

Caution

Chronic digestive weakness with Spleen Qi deficiency as the primary pattern. This formula is dispersing in nature and lacks tonifying herbs, making it unsuitable for long-term use in cases of chronic Spleen deficiency without acute excess.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated during pregnancy. The formula contains several aromatic Qi-moving herbs including Hou Po (Magnolia bark), Mu Xiang (Costus root), and Bo He (Mint) that promote Qi circulation and may stimulate uterine contractions. Cang Zhu (Atractylodes) is also considered cautionary in pregnancy. Product labeling for the equivalent Bao Ji Wan in China explicitly lists pregnancy as a contraindication.

Breastfeeding

Use with caution during breastfeeding. While no specific toxic herbs are present, the formula's aromatic and drying herbs (particularly Cang Zhu, Hou Po, and Bo He) may transfer through breast milk and could potentially affect an infant's developing digestive system. The formula is intended for short-term, acute use, which reduces risk. Consult a qualified practitioner before using while nursing.

Children

The formula has traditionally been used in children at reduced doses. General guidelines suggest half the adult dose for children aged 3 and older, and one-third for younger children. For very young children (under 3), the pills may need to be crushed and dissolved in warm water for easier administration. As this is a dispersing formula without tonifying herbs, it should only be used for acute episodes and discontinued once symptoms resolve. Prolonged use in children is not recommended as their Spleen Qi is constitutionally immature and easily damaged by overly dispersing formulas.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Kang Ning Wan

Anticoagulant and antiplatelet medications: Ge Gen (Kudzu root) has been shown to have mild blood-thinning properties. Although amounts in this formula are small, patients on warfarin, aspirin, or similar drugs should exercise caution.

Antihypertensive medications: Gou Teng (Uncaria vine) has documented blood pressure-lowering effects. Combined with antihypertensive drugs, there is a theoretical risk of additive hypotension.

Diabetes medications: Several herbs in this formula (notably Ge Gen and Cang Zhu) may influence blood sugar levels. Patients on insulin or oral hypoglycemic agents should monitor glucose levels more carefully when using this formula.

Sedatives and CNS depressants: Tian Ma (Gastrodia), present in some versions of this formula, has mild sedative properties and could theoretically potentiate the effects of benzodiazepines or other sedating medications.

Usage Guidance

Practical advice for getting the most out of Kang Ning Wan

Best time to take

30 minutes before meals, or at the onset of symptoms. For motion sickness prevention, take 30 minutes before travel. Can be taken 3 times daily as needed.

Typical duration

Acute use only: 1 to 3 days. Discontinue once symptoms resolve. Not intended for long-term or preventive use.

Dietary advice

Avoid greasy, oily, and fried foods while taking this formula, as they generate further Dampness and food stagnation, directly counteracting the formula's purpose. Cold and raw foods (salads, iced drinks, raw fish) should also be avoided, as they impair the Spleen's transformative function. Alcohol should be avoided. Favor light, easily digested foods such as plain rice porridge (congee), steamed vegetables, and clear soups. Eat small, frequent meals rather than large portions to reduce the burden on an already compromised digestive system.

Kang Ning Wan originates from Traditional Guangdong folk formula (民间验方); no single classical text attribution Unknown; traditional folk formula from Southern China, widely popularized as a patent medicine

Classical Texts

Key passages from the classical Chinese medical texts that first described Kang Ning Wan and its clinical use

This formula does not derive from a single classical text but rather from the folk herbal tradition of Southern China. It originated as a cooling herbal tea prescription (Pu Ji Cha, 普济茶) in the late Qing Dynasty, based on principles found across multiple classical works on Dampness transformation and middle burner regulation.

The treatment strategy draws on the classical teaching that when Dampness obstructs the middle burner, the proper approach is to use aromatic herbs to transform Dampness, acrid-warm herbs to dry Dampness, and bland herbs to drain Dampness. This multi-pronged approach to Dampness is rooted in the Wen Bing Xue (Warm Disease) tradition, which teaches that Dampness affecting all three burners requires treatment at each level simultaneously.

Historical Context

How Kang Ning Wan evolved over the centuries — its origins, lineage, and place in the broader tradition of Chinese medicine

Kang Ning Tang/Wan has a colorful history rooted in Southern Chinese folk medicine. The formula traces its origins to the Bao Ji Wan (保济丸, "Preserve and Aid Pills"), created by Li Zhaoji (李兆基) in 1896 in Foshan, Guangdong Province. According to tradition, Li was a street vendor who sold cooling herbal tea near the Foshan Ancestral Temple. A Buddhist monk from a nearby temple, grateful for Li's generosity in offering free tea, gave him a medicinal recipe. Li adapted this into a tea called "Pu Ji Cha" (普济茶, "Tea to Help the Public"), which became famous for treating common ailments like stomach upset, colds, and digestive complaints. He later reformulated it into pill form as Bao Ji Wan, founding the famous Li Zhong Sheng Tang (李众胜堂) pharmaceutical house.

In the 1950s, when the formula was exported to Hong Kong and Southeast Asia, it was marketed under the name "Kang Ning Wan" (康宁丸, "Healthy and Peaceful Pills"), which became its best-known international identity. In Mainland China, the formula was eventually standardized and included in the Chinese Pharmacopoeia under the Bao Ji Wan name. In Hong Kong, it remains a household staple, widely known as "Po Chai Pills" in Cantonese. The formula became so popular that there was once a common saying in Southern China: "In the North there are Liu Shen Wan, in the South there are Bao Ji Wan" (北有六神丸,南有保济丸), reflecting its status as an indispensable family medicine.