- 1 Nomenclature
- 2 Historical Use of Dioscorea opposita
- 3 Background
- 4 Pharmaceutical Information
- 5 Evidence or the Use of Dioscorea opposita in the Treatment of Epilepesy
- 6 Safety
Historical Use of Dioscorea opposita
Dioscorea opposita in Traditional Chinese Medicine
Chinese Name (pinyin): Shanyao
Chinese Name :
Common Name :Chinese Yam
Specific Name : Rhizoma dioscoreae
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
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
Evidence or the Use of Dioscorea opposita in the Treatment of Epilepesy
Cohort, Case-Control and Non-Randomized Trials
Randomized Controlled Trials
1st Five Results: pubmed search