Common Yam Rhizome is the dried rhizome of Dioscorea opposita
drug is collected in winter when the stem and leaf are withered,
deprived of root stock, washed clean and deprived of outer
bark and fibrous root; fumigated with sulfur, and then dried.
Otherwise thick large straight and dried rhizome is sorted,
soaked in clean water until the central portion of the druggets
wet and softened thoroughly, then fumigated with sulfur, cut
two ends to smooth plane and rubbed on a board to become cylindrical
in shape, dried in the sun and finally polished. It is known
as"Guang Shanyao". ( Polished Common Yam Rhizome).
To replenish the
spleen and stomach, to promote fluid secretion and benefit
the lung, and to strengthen the kidney and restrain seminal
discharge. Rhizoma Dioscoreae (stir-fried with bran): To replenish
the spleen and promote the stomach function.
and chronic diarrhea due to diminished function of the spleen;
cough and dyspnea due to diminished function of the lung;
seminal emission, excessive leukorrhea, frequency of urination
or diabetes due to deficiency condition of the kidney. Rhizoma
Dioscoreae (stir-fried with bran): Diminished function of
the spleen with anorexia, diarrhea and excessive leukorrhea.