1. Pharmaceutical name: Radix or Rhizoma Cynanchi Stauntonii.
2. Botanical name:
Cynanchum stauntonii (Decne. ) Schltr. Ex Levl.
Cynanchum glaucescens (Decne. ) Hand. Mazz
3. Common Name: Root and rhizome of cynanchum.
4. Properties (characteristics): Acrid, sweet, neutral.
5. Channels (meridians) entered: Lung.
6. Actions & Indications: Cough due to influenza, bronchitis, asthma with abundance of phlegm. Usually bai qian is being used together with zi wan, ban xia. It can be used in cold type and hot type of cough.
7. Toxicity & Cautions: According to the classics "Ben Cao Jing Su": Do not use in cough due to qixu (qi deficient) and not due to infection.