Transcript Laxatives.

Laxatives
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Objectives
On completion of this period, you would be
able to know :
Definition,
Classification and
Uses of
Laxatives.
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Known to Unknown
1. Have you come to know Milk of Magnesia ?
2. Is it Laxative (or) Purgative ?
3. Can you name some Purgatives & Laxatives in
Pharmacognosy ?
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Laxatives
Definition :
Laxatives :
Latin : laxare : to loosen
• Drugs which loose the bowels (intestines) or
• Drugs which producing, increasing and hastening
intestinal evacuation
• Drugs which promote defecation
(Push out the excreta from the body through the Anus)
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Laxatives
Classification :
•
Depending upon the intensities of drug effect they
are classified as :
Laxatives : Eliminate the soft formed stools
also known as Mild Purgatives.
e.g.
Karaya gum
Senna
Carboxy methyl cellulose
Isapgol
Liquid-paraffin
Bran
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Laxatives
•
Purgatives : fluid evacuation
e.g.
Castor oil
Aloe
Cascara sagrada
Rhubarb
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Laxatives
• Drastics
: Act intensely by irritating the mucous
membrane of the intestine.
e.g.
Jalap
Colocynth
Podophyllum
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Laxatives
•
Hydrogogues : Produce fluid motion
e.g.
Croton oil
Colocynth
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Laxatives
Mechanism of action :
•
Bulk forming
•
Irritant or
•
Emmollient
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Laxatives
Uses :
• In constipation
• In evacuation of bowls , prior to diagnostic
procedure or surgery.
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Summary
In this class, we have discussed about:
• Laxatives are the drugs which loose the bowels or the
drugs producing, increasing and hastening the intestinal
evacuation
• Used in the constipation and in
• Evacuation of the bowels, prior to
• Diagnostic procedures or surgery.
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Quiz
1. Laxatives used in
A.
Constipation
B.
Diarrhoea
C.
Dysentery
D.
Diabetes
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Quiz
2. Identify the drug which is used as laxative
A. Castor oil
B. Senna
C. Rhubarb
D. All the above
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Frequently Asked Questions
1.
Define the term laxative?
Classify them with suitable examples
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