Léigōng Pàozhì Lùn 雷公炮炙論
Lord Léi’s Treatise on Drug Processing by 雷斆 (Léi Xiào, 5th c., 南朝·宋)
About the work
The Léigōng pàozhì lùn is the earliest systematic Chinese treatise on drug processing (pàozhì 炮炙 — the techniques of heating, cleaning, soaking, fermenting, slicing, calcining, and otherwise modifying raw drug substances before clinical use). Compiled by the late-Liú-Sòng-period physician Léi Xiào, the work covers approximately 300 substances and gives for each the standard processing protocols that modify the substance’s pharmacological action. The author’s surname Léi was at an early date conflated with the legendary “Lord Léi” (雷公) of the Yellow-Emperor medical tradition — a SùwènLíngshū interlocutor of Huángdì — so the work circulated under the more authoritative title Léi gōng pàozhì lùn although it is in fact a historical 5th-c. composition.
The work’s opening section — preserved in the local repository — lays out the metrological framework for compound pharmacology: the fāng (formula) directions specifying pill sizes “like a small sesame”, “like a large sesame”, “like a small bean”, “like a large bean”, “like a hare’s pellet”, “like a wútóng seed”, “like a small bullet” are correlated with weights from 4 liǎng through 16 liǎng using a calibration against a counted number of carp-eye stones (鯉魚目). This kind of practical metrological detail is characteristic of the Pàozhì and is the source for much of our knowledge of pre-Táng Chinese pharmaceutical measurement.
The work is the founding text of the Chinese pàozhì tradition. The TángSòng pharmacopoeias (Táo Hóngjǐng 陶弘景’s Běncǎo jīng jí zhù KR3ec003, the Xīn xiū běncǎo KR3ec004, the Zhènglèi běncǎo KR3ec009) all draw on the Pàozhì lùn extensively, and through them the pàozhì methodologies of Léi Xiào were transmitted to the entire subsequent Chinese pharmacological tradition. The work was largely lost as a standalone text but has been reconstructed in modern critical editions from the extensive quotations in later works.
The local repository preserves only a small portion of the reconstructed text — the metrological opening plus selected substance entries.
Prefaces
The local repository preserves Léi Xiào’s general opening discussion of compound-pharmaceutical measurement (Léi Xiào lùn héyào fēnjì liàolǐ fǎzé 雷斆論合藥分劑料理法則).
Abstract
Léi Xiào (雷斆, fl. 5th c., no confident CBDB id). See his person note. The historical Léi is dated to the LiúSòng period (420–479) on the evidence of the Suí shū Jīngjízhì and the Sòng shǐ Yìwénzhì. He is one of the earliest named medical authors of the post-Hàn period whose work survives in even partial form.
The work’s significance is foundational: it is the first Chinese systematic treatment of pàozhì, and it established the conceptual framework — different processing protocols yield different pharmacological actions from the same source substance — that has remained central to Chinese pharmacology ever since. The work also established the convention of distinguishing “raw” (生) and “processed” (熟) forms of major substances (gypsum raw vs. calcined, fù zǐ raw vs. salt-processed, dìhuáng raw vs. wine-soaked-and-steamed, etc.) — a convention that persists in modern TCM pharmacology. The Lǐ Shízhēn 李時珍 Gāngmù KR3ec025 Pàozhì-supplement KR3ec087 and Miù Xīyōng 繆希雍’s Pàozhì dàfǎ KR3ec088 are direct descendants of the Léigōng tradition.
Translations and research
- Zhèng Jīnshēng 鄭金生. 2007. Yào lín wài shǐ 藥林外史.
- Wáng Xīngfā 王興法 ed. 1986. Léigōng pàozhì lùn (reconstruction). Shanghai zhongyi.
- Unschuld, Paul U. 1986. Medicine in China: A History of Pharmaceutics. UCP. — discusses the Pàozhì tradition.
- No complete Western-language translation.
Other points of interest
The conflation of the historical author 雷斆 with the legendary 雷公 of the Huángdì nèijīng tradition is one of the principal examples in Chinese medical history of a historical author being absorbed into a mythical-canonical persona. Modern scholarship distinguishes them, but the conflation was already firm by the Táng and has shaped the way the Pàozhì lùn was received throughout the subsequent tradition.
Links
- Wikidata: Q11378122 (雷公炮炙論).
- 雷公炮炙論 jicheng.tw
- Kanseki DB