Zhen Zhu Mu (珍珠母) — Mother of Pearl | TCM Herb Guide

At a Glance

• Herb: Zhen Zhu Mu
• Chinese name: 珍珠母 (Zhēn Zhū Mǔ)
• Latin name: Margaritifera concha
• Nature: Cold
• Taste: Salty
• Meridian: Liver / Heart
• Category: Herbs that Anchor, Settle, and Calm the Spirit
• Introduction: Zhen Zhu Mu (珍珠母), Concha Margaritifera, is the shell of Hyriopsis cumingii or Cristaria plicata, freshwater pearl mussels. A heavy, sinking mineral herb, it anchors liver yang, calms the spirit, clears liver heat, and brightens the eyes. Used for liver yang rising with headache, dizziness, tinnitus, and for heart-spirit disturbance with insomnia and palpitations. Its calcium carbonate and amino acid content exhibit sedative, antihypertensive, and antioxidant properties in modern pharmacological studies.

Action

• Calms the liver and anchors yang
• Clears liver heat and brightens the eyes
• Calms the heart and spirit
• Stops bleeding (topical)

Clinical Application

• Liver yang rising: headache, dizziness, tinnitus, hypertension — combines with Shi Jue Ming, Niu Xi, Bai Shao
• Liver fire with red, painful eyes and visual disturbance — combines with Jue Ming Zi, Xia Ku Cao
• Heart-spirit disturbance: insomnia, palpitations, anxiety — combines with Suan Zao Ren, Yuan Zhi, Fu Ling
• Superficial eye conditions (external corneal ulcers) — powdered topical application
• Hyperthyroid nodules with liver-yang pattern

Precautions

• Dosage: 15–30 g in decoction; decoct first (先煎) 30–60 minutes
• Contraindicated in spleen deficiency cold with loose stools
• Avoid in cold patterns without liver yang rising or heat
• Must be decocted first to release active minerals
• Distinguished from Zhen Zhu (珍珠, pearl): shell is for calming liver yang; pearl is for calming heart spirit and topical wound healing

Formula

• Zhen Zhu Mu Wan (珍珠母丸): Zhen Zhu Mu, Long Chi, Suan Zao Ren, Ren Shen, Fu Shen, Chen Xiang, Xi Jiao — calms spirit, anchors yang, treats severe insomnia
• Jian Ling Tang (建瓴汤): Zhen Zhu Mu, Dai Zhe Shi, Long Gu, Mu Li, Huai Niu Xi, Bai Shao, Sheng Di Huang, Zhu Ru — anchors yang, treats hypertension
• Zhen Zhu Mu + Shi Jue Ming + Xia Ku Cao: standard trio for liver yang headache and hypertension

Combinations

• Mother-of-Pearl Shell (珍珠母) + Abalone Shell (石决明) + Gambir Vine (钩藤) → subdue liver yang, calm wind; hypertension, dizziness, and headache
• Mother-of-Pearl Shell (珍珠母) + Dragon Bone (龙骨) + Oyster Shell (牡蛎) → anchor yang, calm the shen; palpitations, insomnia, and anxiety from liver yang disturbance

Pharmacological Effects

• Sedative and anxiolytic
  • calcium carbonate calms CNS excitation
• Antihypertensive
  • lowers blood pressure — subdues liver yang
• Antacid
  • neutralizes gastric acid
• Anti-inflammatory; antioxidant; ophthalmic
  • clears eye inflammation
• Hemostatic
  • topical

Classic Description

• Ben Cao Gang Mu (《本草纲目》) [Pearl entry]: ‘Calms the ethereal and corporeal souls, stops seminal emission and turbid urine, resolves pox toxin, governs difficult delivery, and expels dead fetus and placenta.’
• Yin Pian Xin Can (《饮片新参》): ‘Calms the Liver and subdues yang; calms the ethereal and corporeal souls; settles fright epilepsy; disperses heat focal distension; treats eye opacity.’
• Zhong Hua Ben Cao (《中华本草》): ‘Calms the Liver and subdues yang, settles fright and brightens the eyes; treats vertigo, fright palpitations and insomnia, red eyes with opacity, and blurred vision.’
• Ben Cao Cong Xin (《本草从新》): ‘Calms the Heart and the Liver; especially suited for liver yang rising with headache and irritability.’