Pinyin: shan yao
ENGLISH NAME: Chinese Yam
LATIN NAME: Dioscoreae Rhizoma
Properties: sweet, neutral
Channels Entered: Kidney, Lung, Spleen
CHINESE THERAPEUTIC ACTIONS
1. Tonifies Qi and Nourishes Spleen and Stomach Yin
2. Tonifies Qi and Nourishes Lung Yin
3. Treats Xiao Ke (Wasting and Thirsting) Syndrome
4. Tonifies Kidney Yin
10 to 30 grams, with a maximum of 250 grams, in decoction. Shan Yao is prescribed at 6 to 10 grams in powder form. It may be used internally or topically. The fresh herb is commonly used to tonifiy yin， while dried Shan Yao is more often used to strengthen the Spleen and Stomach. The dry-fried herb has a stronger function to tonify the Lung, Spleen and Stomach, and is commonly used to treat diarrhea and leukorrhea.
CAUTIONS I CONTRAINDICA TIONS
• Shan Yao is contraindicated in cases of excess heat.
• Shan Yao should not be used as the sole herb in address-
ing cases of accumulated dampness.
• Shan Yao may sometimes cause abdominal fullness, distention or poor appetite. In cases of indigestion due to intake of this herb, add Chen Pi (Pericarpium Citri Reticulatae) to regulate qi and relieve these minor side effects.