Dioscorea nipponica (Chuanshanlong)

Distribution:
Inner Mongolia, Heilongjiang, Jilin, Liaoning, Hebei, Henan, Shanxi, Shaanxi, Gansu, Sichuan, Guizhou, Hubei, Hunan, Shandong, Anhui, Jiangsu, Zhejiang, Jiangxi and other places.
 
Properties  (characteristics):
Sweet, bitter, warm.
 
Channels (meridians) entered:
Medical functions:
Arresting cough
expelling phlegm
soothing asthma

cardiovascular effect:In a rabbit study the total saponins of 10mg/kg can significantly reduce blood cholesterol and blood pressure, lower heart rate, increase heart contraction amplitude, increase urine output, reduce the β / α ratio of lipoprotein improving coronary circulation. It may be effective for patients with mild atherosclerosis.

Anti-cancer effect: chuan shan long inhibited the invasion of oral cancer cells and may have potential use as a chemopreventive agent against oral cancer metastasis.

inhibitory potential against fat absorption thus may have anti obesity effect. 

Actions & Indications:
For improving circulation, relaxing muscles, helping digestion and as diuresis, expectorant, stopping malaria, arresting muscle and joint pain due to wind, cold and dampness, Chronic Bronchitis, indigestion, injuries and sprain, treating malaria, Carbuncle.
 
Chemical ingredients: 
Dioscin 
gracillin 
asperin 
25-D-spirosta-3, 5-diene 25-D
piscidic acid 

Dosage:
Oral: make into decoction, 15 to 30 g. (fresh herb, double the amount), or soak in rice wine.
External application: smash and apply.