White Dragon Powder

Baengnyong-san

한글 백룡산 · Pinyin Bai Long San

白龍散

No weights are given: the mirabilite is one crystal carried for a hundred and twenty days and the borneol is 少許, a little. The dose is two grains' worth of the finished powder.

Composition 構成

Mangcho Mang Xiao
芒硝 망초 · Mirabilite

—
Chief 君

wrapped in thick paper and carried against the skin inside the robe for 120 days, then ground to powder
Yongnoe Long Nao
龍腦 용뇌 · Borneol

—
Assistant 佐

a little, added to the powder

Total 0 g per packet (첩) · representative dosage — verify against source texts. Excludes 2 ingredients measured by count or used as a vehicle, shown as —.

Received this formula from your practitioner? Amounts shown here are classical reference values — granule and prepared products differ. Always follow your prescribed dosage and directions.

Actions 效能

Brightens the eye and drives back a screen
Cools and clears a clouded eye

Indications 主治

Pattern-based

A clouded eye with a screen arising (眼昏生瞖)
Screens and opacities where the pupil is not broken (瞳人不破者)

Biomedical correlates

Corneal opacity
Corneal scarring with preserved pupil

Source text 原文

Donguibogam 東醫寶鑑

明目退瞖. 馬牙硝厚紙裹, 在懷內着肉, 養一百二十日, 取硏如粉, 入龍腦少許, 取兩米許點目中. 治眼昏生瞖, 瞳人不破者, 幷醫得. 《本草》

Translation

Brightens the eye and drives back a screen. Mirabilite crystal, wrapped in thick paper and kept against the skin inside the robe, nursed there for a hundred and twenty days; then taken out, ground to a powder, a little borneol added, and about two grains' worth dabbed into the eye. It treats a clouded eye with a screen arising, and where the pupil is not broken it can cure them all. — Boncho 本草 (Donguibogam · An)

Clinical commentary 臨床

**Not the ear formula of the same name**, which is a separate prescription for sudden severe earache; this is the eye powder of the Eye chapter's Simple Medicinals. The hundred and twenty days against the skin are the whole method: mirabilite left in body heat and moisture slowly loses water and recrystallises finer, and what is dabbed in the eye is a very fine, nearly neutral salt powder with a trace of borneol for the cooling sting. 瞳人不破者 is the honest limit — a scarred cornea over an intact pupil may clear a little, and nothing in the powder will help an eye that has perforated. — Eui Young (Justin) Chung, L.Ac., Dipl. O.M.