Run Chang Wan润肠丸

Moisten the Intestines Pill

Purging Downward 泻下剂Moist Laxative 润下

Ingredients5 herbs

HerbDosageRoleWhat it does in this formula

火Huo Ma Ren火麻仁Cannabis Semen37 g君 ChiefMoistens the intestines and softens the dry stool 桃Tao Ren桃仁Persicae Semen30 g君 ChiefMoistens the bowel and moves the blood that has stopped nourishing it 当Dang Gui Shao当归梢Angelicae Sinensis Radix15 g臣 DeputyNourishes and moves blood, moistening the intestines from within 大Da Huang大黄Rhei Radix et Rhizoma15 g臣 DeputyDrains the dry accumulation downward, in a restrained pill dose 羌Qiang Huo羌活Notopterygii Rhizoma et Radix15 g佐 AssistantDisperses the wind element of the dryness and lifts the qi dynamic

Indications

Moistens the intestines and unblocks the stoolInvigorates blood and dispels windGently drains the dry accumulation

Intestinal dryness from taxation with blood depletion and wind-dryness. Nothing here is a hot bowel excess; the stool is dry because the intestines have lost their moisture and the blood no longer nourishes them.

Clinical Manifestations

Dry, hard constipation following overwork and irregular eating
Constipation from blood depletion, with no appetite
Wind-dryness constipation
Habitual constipation in a patient too dry for a full purge

TongueDry, pale or slightly red with little coating

PulseThin, sometimes rough

Health Categories

Digestive HealthSkin HealthHeart & Circulation

Modern Applications

Chronic constipation Habitual constipation Anaemia Poor appetite Dry skin

Common adjustments

Blood depletion marked — add blood tonics such as Shu Di Huang 熟地黄 and Bai Shao 白芍
Dryness marked with a stripped tongue — add Sheng Di Huang 生地黄 and Xuan Shen 玄参
Stomach heat clearly present — the pattern belongs to Ma Zi Ren Wan rather than here

Contraindications

Not for a hot bowel-excess pattern with distension and hardness — the moistening approach is too slow for that. The Da Huang content means it should not be relied on indefinitely; long-term use of anthraquinone laxatives is not appropriate, and persistent constipation needs the underlying deficiency treated.

For licensed practitioners’ reference only — not a self-treatment guide.

Pregnancy

Not used in pregnancy. Da Huang purges downward and Tao Ren and Dang Gui Shao move blood — the combination is avoided during pregnancy even in this comparatively gentle pill form. Constipation in pregnancy should be managed with dietary measures and formulas chosen for that situation by a practitioner.

References

Source Pi Wei Lun 《脾胃论》 · Jin

「治饮食劳倦，大便秘涩，或干燥闭塞不通，全不思食，乃风结、血结，皆能秘塞也。」
— 《脾胃论》(classical source, public domain)

Classical source (public domain), cited in the source-quote section.
2. Scheid, Bensky, Ellis & Barolet. Chinese Herbal Medicine: Formulas & Strategies, 2nd ed. — composition & dosage cross-checked.
3. 《方剂学》（全国中医药行业高等教育规划教材）— chapter placement, 功用 and pattern analysis cross-checked.

Professional reference notice. Entries are scholarly references for licensed TCM practitioners and students — not medical advice, and not a recommendation to self-prescribe. Chinese herbal formulas should be used under the guidance of a qualified practitioner. Content is an original editorial compilation by Cura x Cura, cross-checked against the cited references.