Radix Peucedani

 

Source
The root and rhizome of Peucedanum praeruptorum Dunn and P decursivum Maxim., family Umbelliferae.

Characteristics
P. praeruptorum: Axial root thick and short terete or conical, with 1-2 branching roots; 6-9 cm long, 1-2 cm in diameter. Surface brown, rhizome with dense annular nodes. Prepared by crosscutting; section yellowish white, scattered oil spots visible; cortex thick and loose. P decurivum: Axial root longer, annular nodes in the rhizome inconspicuous, with 2-3 spreading branches; cross section showing a narrower cortex with oil spots, while the xylem with few or no oil spots. Bitter and acrid in taste, slightly cold in nature, and attributive to lung channel.

Indication
Open the inhibited lung-energy, eliminate phlegm, lower the adverse-rising energy and relieve cough: For wind-heat syndrome manifested as cough with thick sputum and chest upset; for undescending of lung-energy with cough and dyspnea.

Pharmacological Action
1. Oral use of its decoction can increase secretion of respiratory tract significantly and promote expectoration.
2. Its active component nodakenetin possesses antibacterial and antimycotic effects.

Administration Decoction: 3-9g.


   

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Mr. Wang Tao

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