Studies of Rhei Rhizoma (Da-hung Dab) -A Herbological Study on Its Medicinal Effects and Medicinal Parts
|Keywords:||1999藥用植物之開發與利用研討會論文集;Proceedings of the Symposium on Development and Utilization of Medicinal Plants 1999||Issue Date:||Mar-1999||Publisher:||台中：農業試驗所||Start page/Pages:||103-111||Source:||1999藥用植物之開發與利用研討會論文集:||Abstract:||
現今大黃之根莖通常被利用為瀉下藥，在古代它是否被利用為瀉下藥，或是去瘀血藥（身體內之淨化劑，尤其可淨化凝滯之血液），頗值得進行探究；此外，現今市面上販賣之大黃產品，是否即其最重要之藥用部位，更值得進行深入探討。研究結果顯示，大黃之根莖在古代主要被利用為去瘀血藥，以淨化凝滯之血液，雖然有時也被用為瀉下藥或其他用途。直到清朝，主要大黃之物種包括R. palmotum L.之根莖才被確認為品質最佳之去瘀血大黃生藥產品，大黃之根則被利用為瀉下藥
Although the crude drug Rhei Rhizoma (Chinese: Da-huang; Japanese: Daio) is now commonly employed as a purgative, some question remains as to whether it was originally used as a depurative (purifying agent; specifically an agent for expelling Stagnated Blood) or purgative in ancient times. There is also some conf usion as to the medicinal part of the crude drug being sold on the market. This herbological study was carried out in order to clarify these issues. The results showed that Rhei Rhizoma was originally used mainly as an agent to expel Stagnated Blood, although it was also used for its purgative and other properties. Until the Qing dynasty, the rhizome of the large Rheum species, including R. j1ma turn, was known as the best quality Da-huang. The recent use of the root is thought to be due to recognition of the purgative properties of Da-huang.
Da-huang has many medicinal properties in addition to its usefulness as a purgaive, and there is a need for futher study of these properties as well as the differences between the pharmaco-logical actions of the rhizome and those of the root.
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