Dioscorea opposita

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Other Names:

Historical Use of Dioscorea opposita

Dioscorea opposita in Traditional Chinese Medicine


Chaoshanyao ³´É½Ò© Huaishanyao »³É½Ò© Shengshanyao Éúɽҩ Chinese Name (pinyin): Shanyao

Chinese Name  :

Common Name  :Chinese Yam

Specific Name  : Rhizoma dioscoreae

Scientific Name:
Collection  : The 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 dried. Otherwise the thick large straight and dried Rhizome is sorted, soaked in clean water until the central portion of the drug gets wet and soften 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:GuangShanyao" (Polished Common Yam Rhizoma).

Description  : Subcylindrical, curved or somewhat flattened, 15 - 30 cm long, 1.5 - 6 cm in diameter. Externally yellowish white or pale yellow, longitudinal furrowed and wrinkled and bearing fibrous root scar with occasional patches of brownish cork. Texture heavy, compact and tough, uneasily broken, fracture white and starchy, odorless, taste weak, acidulous and viscous when chewed. Guang Shanyao cylindrical, the two ends even, 9 - 18 cm long, 1.5 - 3 cm in diameter, externally smooth, white or yellowish white.

Identification  : Powder: Whitish simple starch granules compressed ovoid subrounded, deltoid ovoid or oblong, 8 - 35 µm in diameter, hilum pointed, V shaped, X shaped or shortly cleft, striation visible. Compound starch granules less common, usually consisting of 2 - 3 granules. Mucilage cells containing raphides of calcium oxalate, up to 240 µm long and needle crystal 2 - 5 µm wide. Bordered pitted, reticulate spiral and annular vessels. 12 - 48µm in diameter

Processing  : Eliminate foreign matter, grade according to size, soak and soften thoroughly, cut into thicker slices and dry.Stir fry with bran: Stir fry the slices of Rhizoma Dioscoreae as described under the method for stir frying with bran (Appendix ll D) to yellowish.

Action  : To replenish the spleen an dstomach, to promote fluid secretion and benefit the lung, and to strengthen the kidney and restrain seminal discharge. Rhizoma Dioscoreae (stir-fried with bran): To replenich the spleen and promote the stomach function.

Indication  : anorexia and chronic diarrhea due to diminished function of the spleen; cough and dyspnea due to diminished function of the lungs; seminal emission, excessive leukorrhea, increased frequency of urination due to deficiency of the kidneyi

Precautions  :

Dosage  : 15 to 30 g.

Storage  : Preserve in a ventilated and dry place, protected from moth.

Synonymns for Dioscorea opposita

Patent Medicines and Medicines with Multiple Ingredients that include Dioscorea opposita

Pharmaceutical Information

Chemical Constituents

Evidence or the Use of Dioscorea opposita in the Treatment of Epilepesy

Basic Science

Animal Studies

Cohort, Case-Control and Non-Randomized Trials

Randomized Controlled Trials


1st Five Results: pubmed search

Dominique Rinaldo
Carbohydrate and bioactive compounds composition of starchy tropical fruits and tubers, in relation to pre and postharvest conditions: A review.
J. Food Sci.: 2020, 85(2);249-259
[PubMed:32031261] [WorldCat.org] [DOI] (I p)

Yunyi Zhou, Shuzhen Luo, Saba Hameed, Dong Xiao, Jie Zhan, Aiqin Wang, Longfei He
Integrated mRNA and miRNA transcriptome analysis reveals a regulatory network for tuber expansion in Chinese yam (Dioscorea opposita).
BMC Genomics: 2020, 21(1);117
[PubMed:32013881] [WorldCat.org] [DOI] (I e)

Jie Zhou, Youli Xi, Jie Zhang, Jun Tang, Xiaowei Zhou, Jiayi Chen, Chao Nie, Zhengbiao Zhu, Bo Ma
Protective effect of Dioscorea zingiberensis ethanol extract on the disruption of blood-testes barrier in high-fat diet/streptozotocin-induced diabetic mice by upregulating ZO-1 and Nrf2.
Andrologia: 2020;e13508
[PubMed:31957918] [WorldCat.org] [DOI] (I a)

Zi-Tian Wu, Zhuo-Qing Li, Wei Shi, Ling-Li Wang, Yan Jiang, Ping Li, Hui-Jun Li
The crucial role of metabolic regulation in differential hepatotoxicity induced by furanoids in Dioscorea bulbifera.
Chin J Nat Med: 2020, 18(1);57-69
[PubMed:31955824] [WorldCat.org] [DOI] (I p)

H B Li, W B Liang, L Zhou
The experimental research on neuroplasticity in rats' hippocampus subjected to chronic cerebral hypoperfusion and interfered by Modified Dioscorea Pills.
Heliyon: 2020, 6(1);e02897
[PubMed:31909235] [WorldCat.org] [DOI] (P e)



Side Effect and Warnings

Pregnancy and Breastfeeding

Adverse Effects