Transcript Dioscorea deltoidea

Miscellaneous Drugs
Dioscorea
Objectives
On completion of this period you would be able
to know about :
• The monograph of Dioscorea
Known to Unknown
1.
Can you identify the above drug?
Dioscorea
Synonym : Yam, Rheumatism root
Boilogical Source :
Dried tubers of the plants
Dioscorea deltoidea
and other species of Dioscorea
Family : Dioscoreaceae
Fig.70.1 Dioscorea tubers
Dioscorea
Geographical source :
North Western Himalayas
Punjab to Nepal
China
Jammu & Kashmir
Himachal Pradesh
USA & Mexico
Fig.70.2 Dioscorea plant
Dioscorea
Organoleptic characters:
Color : Slightly brown
Odour : Odourless
Taste : Bitter
Size
: Varies depending upon
age of rhizomes
Fig.70.3 Dioscorea tubers
Dioscorea
Chemical constituents:
•
It contains 75% of starch
(Non-edible due to bitter taste)
•
Diosgenin
Steroidal sapogenin (4 to 6%)
•
An enzyme Sapogenase
•
Rich in glycosides and phenolic
compounds
Fig.70.4 Diosgenin
Dioscorea
Uses :
• Precursor for synthesis of several Corticosteroids,
Sex hormones, Oral contraceptives
• In the treatment of Rheumatic arthritis
Summary
In this class we learnt about :
•
The monograph of Dioscorea
•
Dioscorea consists of dried tubers of the
Dioscorea deltoidea
•
It is used as synthesis for Sex hormones,
Corticosteroids, Oral contraceptives etc.,
Quiz
1. Biological source of Discorea is
a. Dried leaves
b. Dried rhizomes
c. Dried tubers
d. Dried bark
Quiz
2. Main chemical constituents present in Discorea
a. Diosgenin
b. Picroside II
c. Kutkoside
d. All of the above
Quiz
3. Dioscorea is used as
a. Bitter tonic
b. Precursor for Sex hormones
c. Febrifuge
d. All of the above
Frequently Asked Questions
1. Write the uses and constituents of Dioscorea
2. Write the family and Biological source of Dioscorea