The calcined shell of Hyriopsis cumingii (Lea), family Unionidae or Pinctada
martensii Dunker, family Pteriidae.
Irregular pieces of various size. Surface jade-white, reddish or yellowish
green and bright; thin pieces translucent, the convex surface with fine
lamellar lines, some with small pores; the concave surface fine and smooth.
Hard in texture, separable in layer when broken into small pieces. Sweet
and salty in taste, cold in nature, and attributive to liver and heart
1. Calm the liver, benefit yin and suppress the sthenic yang: For deficiency
of yin leading to hyperactivity of yang or sthenia of liver-yang manifested
as dizziness, headache, tinnitus, irritability and
2. Clear away liver-fire to improve visual acuity: For conjunctivitis
of liver-heat type, night blindness, blurring of vision due to liver-deficiency
and nebula. Recently, both oral administration and eye ointment are used
for cataract, nebula and keratoleukoma.
3. Antacid, analgesic and hemostatic: For peptic ulcer.
4. Tranquilize the mind: For palpitation, insomnia, amnesia and dementia.
Recently used for neurasthenia, mental retardation, infantile oligophrenia.
5. Deprive dampness and astringe (external use): For eczema, exudative
prurigo. In addition, also used for acute and chronic infectious hepatitis.
1. Its hydrolysate decreases the intestinal tone in vitro and also exerts
a transient diuretic effect in rabbits.
2. Promotes the healing of wound in experimental animals.
Decoction: 15-30g (crushed and decocted first). Powder: 2-3g tid.
External use: Appropriate amount.