Traditional Chinese Medicine Healing Herbs(TCMHH)

Offensive Purgatives

Castor Bean (Semen Ricini)

蓖麻子 Semen Ricini Castor Bean
By the TCMHH editorial team Not medically reviewed How we work Updated 6 Oct 2026
Castor Bean (Semen Ricini)
Castor Bean (Semen Ricini)
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Bi Ma Zi

Name

Bi Ma Zi (Semen Ricini)

The Effect of Bi Ma Zi

Property

Sweet, pungent, neutral, toxic; large intestine and lung meridians entered.

Actions

Resolve swelling and draw out poison, unblock stagnation with purgative.

Indications

Sores and boils, scrofula, pharyngitis, constipation.

Dosage and Administrations

Take the pills or stir-baked product. Proper dosage is for external application, pounded for applying on the affected area.

Cautions

It is contraindicated to pregnant women and people with loose stool.

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Sources and further reading

We cite classical materia medica and modern reference works. This article is health education, not medical advice.

  • Shennong Bencao Jing (The Divine Farmer's Materia Medica), Han dynasty.
  • Bencao Gangmu (Compendium of Materia Medica), Li Shizhen, 1578.
  • Chinese Pharmacopoeia, current edition — identity, quality and safety monographs.
  • NCCIH and WHO reference material on traditional medicine safety.

Spotted an error or a better source? Tell us — corrections are logged on our editorial policy page.

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