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pharmacological classification of crude drugs.pdf
Typology: Summaries
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Crude drugs are classified according to kingdom, subkingdom, division, class, order, family, genus and species as follows.
The crude drugs of plant origin are classified on the basis of one of the accepted systems of botanical classification. A large number of plant families have certain distinguishing characteristics that permit crude drugs from these families to be studied at one time.
Drugs are classified according to their pharmacological action of their main active constituent or their therapeutic uses. Merits- This system of classification can be used for suggesting substitutes of drugs, if they are not available at a particular place or point of time. Demerits- Drugs having different action on the body get classified separately in more than one group that causes ambiguity and confusion. Cinchona is antimalarial drug because of presence of quinine but can be put under the group of drug affecting heart because of antiarrhythmic action of quinidine.
Expectorants- Liqurice, Ipecacaunha, vasaka
Antiexpectorant- stramonium leaves(Atropine)
Antitussives- Opium
Bronchodialators-Ephedra, Tea
3.Drugs acting on cardiovascular system-
Cardiotoics- Digitalis, Squill, Strophanthus
Cardiac depressant- Cinchona, Veratrum
Vasco-constrictors- Ergot, Ephedra
Antihypertensives- Rauwolfia
Adrenergic- Ephedra
Cholinergic- Physostigma, Pilocarpus
Anticholinergics- Belladona, Datura
Central analgesics- Opium
CNS stimulants- Coffee
Analeptics- Nux Vomica, Lobelia, Camphor
CNS depressants- Hyoscymus, Belladona, Opium
Hallucinogenics-cannabis,Poppy Latex
15.Immunising agents- vaccines, Sera, Toxoids, Antitoxins
