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Costaziae Os/Pumex
Costazia bone/pumice
海浮石 〔海浮石〕 hǎi fú shí

Alternate Chinese names: 浮海石 fú hǎi shí
Kingdom: Plant
Origin in PRC Pharmacopoeia: Costazia aculeala Canu et Bassler; Costazia costazii Audouin; pumice. (PRC Pharmacopoeia)
Use: Medicinal
Category: Phlegm-transforming cough-relieving panting-calming agents / Phlegm-transforming agents
Properties: Salty; cold.
Channel entry: Lung and kidney channels.
Actions and indications:
- Clears lung heat and transforms phlegm:
Heat -phlegm cough . - Softens hardness and disperses binds: Scrofula; goiter.
- Additional uses: Hǎi fú shí can disinhibit urine and free strangury (lìn) in the treatment of stone strangury and blood strangury. For this, it is combined with Xiǎo jì (小蓟 Cirsii Herba, field thistle), Pú huáng (蒲黄 Typhae Pollen, typha pollen), and Mù tōng (木通 Akebiae Trifoliatae Caulis, trifoliate akebia).
Dosage and method: Oral: 10–15g in decoctions. Decoct wrapped in cloth.
Quality: Should be grayish white in color, and light enough to float.
Production area: Guǎngdōng, Fújiàn, Shāndōng, Liáoníng.
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