Oyster shell (Muli)
Ostrea gigas Thunb (Fam. Ostreidae)
Pharmaceutical Name: Concha Ostreae
Zoological Name: 1. Ostrea gigas Thunb.; 2. Ostrea talienwhanensis Cross; 3. Ostrea rivularia Gould (Fam. Ostreidae)
Common Name: Oyster shell
Source of Earliest Record: Shennong
Bencao Jing.
Part Used & Method for Pharmaceutical
Preparations: Oyster shells are collected from the ocean in winter or
spring. They are cleaned and dried in the sun, then pounded into powder.
Properties & Taste: Salty and
slightly cold.
Meridians: Liver and kidney.
Functions: 1. To pacify the liver and
subdue the yang; 2. To soften hardness and release nodules; 3. To stop
perspiration, nocturnal emissions and leukorrhagia by astringents.
Indications & Combinations:
1. Deficient yin of the liver and kidneys
and upward flaring of yang manifested as dizziness, vertigo, blurred vision,
tinnitus, palpitations, irritability and insomnia. Oyster shell (Muli) is
used with Dragon's bone (Longgu), Tortoise plastron (Guiban) and White peony
root (Baishao).
2. Late stage of febrile disease with
exhaustion of yin and body fluids which leads to malnutrition of tendons and
muscles manifested as spasms, or convulsions. Oyster shell (Muli) is used
with Tortoise plastron (Guiban), Donkey hide gelatin (Ejiao), White peony root
(Baishao) and Turtle shell (Biejia) in the formula Sanjia Fumai Tang.
3. Scrofula due to phlegm and fire.
Oyster shell (Muli) is used with Thunberg fritillary bulb (Zhebeimu) and
Scrophularia (Xuanshen) in the formula Xiaolei Wan.
4. Spontaneous sweating and night sweating
due to weakness of the body. Oyster shell (Muli) is used with Astragalus
root (Huangqi), Ephedra root (Mahuanggen) and Light wheat (Fuxiaomai) in the
formula Muli San.
5. Nocturnal emissions due to kidney
deficiency. Oyster shell (Muli) is used with Flattened milkvetch seed
(Shayuanzi), Euryale seed (Qianshi) and Lotus stamen (Lianxu) in the formula
Jinsuo Gujing Wan.
6. Uterine bleeding and leukorrhagia due to
deficient Chong and Ren meridians. Oyster shell (Muli) is used with
Dragon's bone (Longgu), Dioscorea (Shanyao) and Schisandra fruit (Wuweizi).
7. Concha Ostreae can be used to relieve
hyperacidity and acid reflux of the stomach.
Dosage: 15-30
g, decocted in water before other herbs. The calcined
form is used to induce astringency and relieve hyperacidity.
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