Ma Zi Ren Wan

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麻子仁丸 (Hemp Seed Pill)

Source: Shang Han Lun — Zhang Zhongjing (Han, 220)

Last updated July 22, 2026

Habitual constipationDry hard stoolsConstipation in the elderlyPost-illness constipationConstipation with frequent urination (Spleen constraint pattern)

Description

Ma Zi Ren Wan (Hemp Seed Pill) is a mild laxative formula treating constipation from Spleen constraint — where excess Yang Ming heat causes the Spleen's function of transportation to be constrained, resulting in dry stools. Compared to Da Cheng Qi Tang, it is much milder and suitable for chronic constipation in constitutionally drier individuals.

Composition

Herb Amount % Role Function
Huo Ma Ren 20g 29.41% Jun (Chief) Moistens the Intestines and unblocks the bowels
Xing Ren 9g 13.24% Chen (Deputy) Directs Lung qi downward and moistens the Intestines
Bai Shao 9g 13.24% Chen (Deputy) Nourishes yin and harmonizes to prevent injury from purgation
Da Huang 12g 17.65% Zuo (Assistant) Drains heat and purges accumulation
Zhi Shi 9g 13.24% Zuo (Assistant) Breaks up stagnant qi and reduces distention
Hou Po 9g 13.24% Zuo (Assistant) Moves qi and eliminates fullness

Total weight: 84g

Preparation

Available as honey pills. Grind herbs, bind with honey into 9g pills. Take with warm water before sleep.

Dosage

Pills: 6–9g twice daily with warm water. Adjust dose to achieve soft stools. Can be used long-term at lower doses.

Conditions Addressed

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Match score combines dosage-weighted composition (cosine, 70%) with shared-herb overlap (Jaccard, 30%).

Traditional formula information is for educational purposes only. Herbal formulas should be prescribed by a qualified practitioner — dosages and combinations are individualized and can interact with medications.

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