Formulas · Release the Exterior 解表 · Boncho (本草)
Ephedra Decoction for the Pox That Turns Back
Mahwang-tang
한글 마황탕 · Pinyin Ma Huang Tang
A homonym, not the formula already registered as mahwang-tang. That entry is Zhongjing's classic as the Bogam gives it in the Cold Damage chapter from Immun — ephedra 3 don with cinnamon twig, licorice and apricot kernel, plus ginger and scallion white, for taiyang cold damage with no sweating — and it carries Tao's six-drug variant as well. This leaf is a single drug at 5 don from Boncho, for a smallpox eruption that has turned back, and shares with the other only its chief and its name. Four drugs against one, a different source, a different disease and a different dose of the shared drug: the chapter tail -soa is taken, following the house rule. The transcription writes 黑鲩 and 𠍠; 陷 and 熱 are printed above.
Composition 構成
- Mahwang麻黃 마황 · Ephedra20 g
Chief 君去節 五錢, nodes removed, boiled and the surface froth discarded
Total 20 g per packet (첩) · representative dosage — verify against source texts.
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
- Claims to bring out a pox that has turned back and sunk black, by forcing the exterior open
- Five don of ephedra, nodes removed, boiled and the froth skimmed off
- Decocted again until a third is gone, strained, and drunk while still hot
Indications 主治
Pattern-based
- The pox turning back and sinking black (倒靨黑陷)
Biomedical correlates
- Smallpox with the eruption failing to crust — historical
- Haemorrhagic smallpox — historical
Source text 原文
Donguibogam 東醫寶鑑
治倒靨黑陷. 麻黃(去節) 五錢, 煎沸, 去上沫, 再煎去三分之一, 去滓, 乘熱服, 神效. 《本草》
Translation
Treats the pox that turns back and sinks black. Ephedra with the nodes removed, 5 don; decoct to a boil, skim off the froth on the surface, decoct again until a third of it is gone, strain off the dregs, and drink it while still hot — marvellously effective. — Boncho 本草 (Donguibogam · Soa)