INTERNATIONALE PHARMACEUTICA SCIENCIA
| Jan-March 2011 | Vol. 1 | Issue 1 |
Available online http://www.ipharmsciencia.com
Phytochemical screening and Extraction: A Review
Plants are a source of large amount of drugs comprising to different groups such as antispasmodics, emetics, anti-cancer, antimicrobials etc. A large number of the plants are claimed to possess the antibiotic properties in the traditional system and are also used extensively by the tribal people worldwide. It is now believed that nature has given the cure of every disease in one way or another. Plants have been known to relieve various diseases in Ayurveda.
Prashant Tiwari*, Bimlesh
Kumar, Mandeep Kaur, Gurpreet
Kaur, Harleen Kaur
Department of Pharmaceutical
Sciences, Lovely School of
Pharmaceutical Sciences, Phagwara,
Date of Submission: 12-01-2011
Date of Acceptance: 22-02-2011
Conflict of interest: Nil
Source of support: None
characterization of various plants and plant constituents against a number of diseases based on their traditional claims of the plants given in Ayurveda. Extraction of the bioactive plant constituents has always been a challenging task for the researchers. In this present review, an attempt has been made to give an overview of certain extractants and extraction processes with their advantages and disadvantages.
Keywords: Medicinal plants, phytochemicals, extraction, solvent, screening.
extracts. Such preparations have been popularly called
Plant-derived substances have recently become of
galenicals, named after Galen, the second century
great interest owing to their versatile applications.
Greek physician .
Medicinal plants are the richest bio-resource of drugs
Extraction methods used pharmaceutically involves
the separation of medicinally active portions of plant
tissues from the inactive/inert components by using
medicines, pharmaceutical intermediates and chemical
selective solvents. During extraction, solvents diffuse
entities for synthetic drugs .
into the solid plant material and solubilize compounds
Extraction (as the term is pharmaceutically used) is the
with similar polarity .
separation of medicinally active portions of plant (and
The purpose of standardized extraction procedures for
animal) tissues using selective solvents through
crude drugs (medicinal plant parts) is to attain the
standard procedures. The products so obtained from
therapeutically desired portions and to eliminate
plants are relatively complex mixtures of metabolites,
unwanted material by treatment with a selective
in liquid or semisolid state or (after removing the
solvent known as menstrum. The extract thus
solvent) in dry powder form, and are intended for oral
obtained, after standardization, may be used as
or external use. These include classes of preparations
medicinal agent as such in the form of tinctures or
fluid extracts or further processed to be incorporated
tinctures, pilular (semisolid) extracts or powdered
in any dosage form such as tablets and capsules. These
products contains complex mixture of many medicinal
Address for correspondence
*Prashant Tiwari (Research Scholar)
Department of Pharmaceutical sciences
Lovely Professional University,
Ludhiana-Jalandhar G.T. Road
Phagwara (Punjab), 144402, India
*Mob: +919888418518 E.mail: email@example.com
plant metabolites, such as alkaloids, glycosides,
terpenoids, flavonoids and lignans .
The general techniques of medicinal plant extraction
include maceration, infusion, percolation, digestion,...
References: sheep. Int. J. Agric. Biol. 2009; 11: 431–436.
Terminalia arjuna bark. Int. J. Agric. Biol. 2009; 11:
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