The root of Aucklandia lappa Decne., family Compositae.
Root terete, 5-10 cm long, 0.5-5.0 cm in diameter; cork peeled off showing
yellow-brown in colour, with longitudinal wrinkles and grooves; tip flat
and slightly concavity in the middle. The whole root appears as a dead
bone. Prepared by crosscutting; section dull brown, exhibiting a light
colour peripherally under the deep coloured annular stria, vascular bundles
radiately arranged, and oil spots scattered. Strongly aromatic in odour.
Acrid and bitter in taste, warm in nature, and attributive to spleen,
stomach, large intestine and gallbladder channelL
Disperse the stagnated liver energy and regulate the stomach, activate
vital energy circulation and alleviate pain: For stagnation of spleen
energy and stomach energy with fullness and pain in the abdomen, belching,
nausea and vomiting; for diarrhea and dysentery with abdominal pain and
tenesmus, used together with Rhizoma Coptidis; for stagnation of liver
energy and gallbladder energy with hypochondriac distension and pain,
usually used together with Radix Bupleuri, Pericarpium Citri Reticulatae
Viride, Radix Scuteliariae, etc. Also added to tonics in small dose for
promoting digestion and regulating stomach energy.
1. Dihydrocostus lactone isolated from its volatile oil relaxes the spasm
of smooth muscles of bronchus and small intestine.
2. Its extract can lower blood pressure.
Decoction: 3-9g (decocted later).