[PDF] Trease and Evans Pharmacognosy ebook pdf

Trease and Evans Pharmacognosy PDF Books

Pharmacognosy the study of plants or other natural sources as a possible source of drugs. it is the study of the physical, chemical constituents, biochemical and biological properties, geographical sources of medicinal plants.

The word ‘pharmacognosy’ had its debut in the early 19th century to designate the discipline related to medicinal plants; it is derived from the Greek pharmakon, ‘a drug’, and gignosco, ‘to acquire a knowledge of’ and, as recorded by Dr K. Ganzinger (Sci. Pharm., 1982, 50, 351), the terms ‘pharmacognosy’ and ‘pharmacodynamics’ were probably first coined by Johann Adam Schmidt (1759-1809) in his hand-written manuscript Lehrbuch der Materia Medica, which was posthumously published in Vienna in 1811.

Schmidt was, until his death, professor at the medico-surgical Joseph Academy in Vienna; interestingly he was also Beethoven’s physician. Shortly after the above publication, pharmacognosy appears again in 1815 in a small work by Chr. Aenotheus Seydler entitled Analecta Pharmacognostica.

Pharmacognosy is closely related to botany and plant chemistry and, indeed, both originated from the earlier scientific studies on medicinal plants.

As late as the beginning of the 20th century, the subject had developed mainly on the botanical side, being concerned with the description and identification of drugs, both in the whole state and in powder, and with their history, commerce, collection, preparation and storage.

The scope and practice of pharmacognosy

Many crude drugs once generally categorized as herbal remedies are now, in accordance with Continental European practice, described in the British Pharmacopoeia (BP).

Chromatographic, chemical and physical tests, together with assay procedures, are given for many drugs for which previously there was no quantitative evaluation of the chemical constituents available.

Although pharmacognosy is principally concerned with plant materials, there are a small number of animal products which are traditionally encompassed within the subject; these include such items as beeswax, gelatin, woolfat, vitamins, etc

Vegetable drugs can be arranged for study under the following headings.

  • 1. Alphabetic
  • 2. Taxonomic.
  • 3. Morpholic
  • 4. Pharmacological or Therapeutic
  • 5. Chemical or Biogenetic.

Overview :

Pharmacognosy embraces a number of scientific and other disciplines providing a unified and comprehen-sive treatment of medicinal plants.

There are constant advances and changes affecting all areas of the subject and, as in the past, this 16th edition addresses these new developments while at the same time maintain-ing the fundamental concepts required for the teach-ing of all aspects of the subject.

It should continue to be of value not only to those of a pharmaceutical and medical persuasion but also to scholars of other disciplines who have an interest in natural products.

Subsequent to the publication of the 15th edition of
this book, many new phytochemicals, their structures and pharmacological activities, have been reported,
especially from those plant materials having current


Part 1 – Introduction
Part 2 – The plant and animal kingdoms as sources of drugs
Part 3 – Principles related to the commercial production, quality and standardization of natural products
Part 4 – Phytochemistry
Part 5 – Pharmacopoeial and related drugs of biological origin
Part 6 – Plants in complementary and traditional systems of medicine
Part 7 – Non-medicinal toxic plants and pesticides
Part 8 – Morphological and microscopical examination of drugs


Book’s Name : Trease and Evans Pharmacognosy
Editor : Daphne Evans
Edition : 16th Edition
Size of PDF : 16.90 MB.
Number Of Pages : 614


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