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Nitrum
Niter
硝石 〔硝石〕 xiāo shí

Alternate Chinese names: 火消 huǒ xiāo; 火硝 huǒ xiāo; 焰消 yàn xiāo; 焰硝 yàn xiāo; 消石 xiāo shí; 银硝 yín xiāo; 化金石 huà jīn shí
Kingdom: Mineral
Use: Medicinal
Category: External-use agents / Toxin-attacking, worm-killing, and itch-relieving agents
Properties: Bitter and salty; cold; toxic.
Channel entry: Heart, spleen, and lung channels.*
Actions and indications:
- Attacks toxin and disperses swelling:
Sores ,boils , andtoxin swellings ; red eyes; throat impediment (hóu bì). - Disinhibits urine and precipitates: Strangury with rough painful urination; jaundice.
- Breaks hardness and disperses accumulation: Sudden turmoil (cholera) or sand distension (shā zhàng) with abdominal pain.
Dosage and method: Oral: Use in powders or pills (1.5–3g). Topical: Grind to make eye medication or laryngeal insufflation.
Warnings: Contraindicated in pregnancy and in general physical weakness.
Production area: Shāndōng, Jiāngsū, Húnán, Húběi, Sìchuān, Guìzhōu.
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