Module 2.2 Flashcards
=knowledge of drugs or pharmaceuticals
Pharmacognosy
Pharmacognosy derived from the Greek word
“pharmakon” = drug
“gignosco” = knowledge
Pharmacognosy It was first coined/used by__ manuscript “__” published in Vienna __
Lehrbuch der Materia Medica
1811
Pharmacognosy Introduced by __ in Haale - Saale,
Germany __ in a work entitled “___
Che.Aenotheus Seydler,
1815
“Analecta Pharmacognostica
Pharmacognosy Embraces a knowledge of the
◼ History
◼ Distribution
◼ Cultivation
◼ Collection
◼ Selection
◼ Preparation
CLAY TABLETS
Babylonians
PAPER SCROLLS
Egyptians
stated a comprehensive scope of Pharmacognosy
as “a simultaneous application of various scientific
disciplines with the object of acquiring knowledge
of drugs from every point of view”
Flükiger
defined as an applied science that deals with the
biologic, biochemical and economic features of
natural drugs that originate from plants and animal
kingdoms.
Flükiger
Egyptian medical papyrus of herbal knowledge.
Ebers papyrus (1550 BC)
oldest and most important medical papyri of ancient
Egypt
purchased at Luxor (Thebes) in the winter of 1873–74 by
Georg Ebers.
Ebers papyrus (1550 BC)
Contents of Ebers papyrus (1550 BC)
HEMLOCK, ACONITE, OPIUM
HAO
The oldest surviving complete medical system in the
world.
Ayurveda (2500 B.C)
Derived from its ancient Sanskrit __
___. – comprehensive outlook to
a healthy life,
‘ayur’ (life) and ‘ved’ (knowledge)
comprehensive outlook to
a healthy life,
Ayurveda (2500 B.C)
He prepared famous oath for physicians, which is still taken by the physicians.
Hippocrates
He is known as father of medicine.
Hippocrates
A Greek physician who wrote his “De Materia Medica” in 78 A.D
which he described about 600 plants that was known to have
medicinal properties (EBACO)
Dioscorides (1st century A.D)
Contents of de materia medica
EBACO
ALOE, BELLADONNA, COLCHICUM, ERGOT, OPIUM
A Greek pharmacist-physician who lived in Rome who described
the method of preparing formulas containing animal and plant drug
Galen (131-200 A.D)
Joseph Caventou
Joseph Caventou Quinine and
Caffeine
Pierre Robiquet
Pierre Robiquet Codeine
Sertuner
Morphine
Rudolf Brandes
Hyoscyamine and Noscapine
Rudolf Brandes and Philipp Geiger
Atropine
Johannes Buchner
Salicin, Nicotine
Carl Koller
Cocaine
Albert Hoffman
LSD
Medicinal materials
It is synonymous with the substances and products
derived from natural sources and employed by
physicians in the old days
Materia Medica:
Are substances whether natural or synthetic, having
therapeutic or medicinal properties and chiefly used
as medicines or an ingredients in medicines
drugs
plants that grow in their native countries
Indigenous plant
Plants that are grown in a foreign land or in a
locality other than their native home
Naturalized plants-
Are whole plants and animals and anatomical parts
Crude drugs
Have not undergone any process or treatment other than
collection and drying
Crude drugs
Are substances or mixture of substances present in crude drugs
which are separated by various means and are employed in a more specific manner
Derivatives or Extractives
Chief principles/constituents
Derivatives or Extractives
Extraction Processes:
● Assay
● Boiling/Decoction
● Percolation
● Maceration
Alternative to Process
A (EXTRACTION ALTERNATIVE)
PROCESS E –
Marc
SOLID
PART;
TO BE
DISCARDED
Menstruum
LIQUID PART;
CONTAINS THE
ACTIVE
CONSTITUENTS
Solid ingredients are placed in a stoppered
container with the prescribed solvent and
allowed to stand for a period of at least 3 days
in a warm place with frequent agitation
Maceration
“soaking”
Maceration with gentle heat
Digestion
Use of percolator - slow passage of suitable
solvent through a column of drug
Percolation
Boiling in water for 15 minutes
Decoction
Maceration in hot or cold water
Infusion
Alcohol:
resin
Acetone:
chlorophyll
Acetic acid:
solanin
Hot benzene:
chrysarobin
Hexane:
fats
Drugs are evaluated by various methods:
Organoleptic Evaluation
Microscopic Evaluation
Physical Evaluation
Instrumental Evaluation
Chemical Evaluation –
Makes use of 5 senses (e.g: Color, odor,
taste, sound of materials)
Organoleptic Evaluation
– Makes use of microscopic details
Microscopic Evaluation
Makes use of Physical Constant (e.g: Specific
gravity, boiling point, refractive index)
Physical Evaluation
Makes use of instrument such as
Chromatography / Spectroscopy to determine specific functional
group of natural drugs
Instrumental Evaluation
Makes use of Test reagents for chemical
synthesis to identify chemical constituent of natural products
Chemical Evaluation –
Determine the effectiveness of the plant
constituent to biological being
Biological Evaluation –
Preparation of Drugs for the Commercial Market
◼ Collection
◼ Drying
◼ Garbling
◼ Packaging, Storage and Preservation
(small scale)
A process of collecting plants properly in accordance with time of harvesting
and proper handling
Collection:
Collection:
Flowers –
Barks –
Root crops –
EXAMPLES:
Flowers – at dawn
Barks – between spring and summer
Root crops – when upper parts are withered
Pectin –
Unripe fruits -
Just ripe -
Overripe -
Pectin – citrus fruits
Unripe fruits - protopectin
Just ripe - pectin
Overripe - pectic acid
Marijuana Young leaves -
Mature leaves -
Marijuana Young leaves - cannabidiol
Mature leaves - cannabinol (THC)
Example of harvesting process
Manual:
*Mechanical
Manual: coffee, digitalis, berries
* Mechanical: apples, oranges
Removes sufficient moisture
(prevent enzyme actions, molds and bacterial growth)
Drying:
Fixes the constituents
Drying:
Drying:
Facilitates __ and _ =
Facilitates grinding and milling = POWDERIZED
Converts to more convenient form for commercial handling
Drying:
Special drying process that enhances the properties of the active
constituents
Curing:
Curing: Examples
Cascara sagrada – _
Vanilla – __
Cascara sagrada – soak in Magnesium oxide for 1 year
Vanilla – pods turn from green to red due to its curing process known as sweating
which releases volatile oil
Vanilla – pods turn from green to red due to its curing process known as
Sweating
Final step in preparation of a crude drug
Garbling:
Removal of extraneous matter (dirt,
adulterants)
Garbling:
May increase drug weight, reduce active constituents and subject to
enzymatic activities
Moisture sensitive drugs
Simplest method: Expose to temperature of 65°C
Protection of drugs against attacks by insects and other form of destruction
Light sensitive drugs
Commerce in Crude Drug
Packaging, Storage, Preservation
Moisture sensitive drugs
Protection of drugs against attacks by insects and other form of destruction