Sources of Drugs | Introduction to General Pharmacology | Drugs Obtained from Plant Source

In today video we have tried to explain the various sources of drugs including all-natural and synthetic sources. source of the drug means all places from where we may collect medicines. In pharmacology subject, this is one of the important topics.

Many drugs were discovered long ago by trial and error. Some were good and are still used today like the opium from the poppy tree, digitalis from the foxglove plant, etc. Discovery of medicinal plants was largely by chance and when tribal people looked for food they discovered various roots, leaves, and barks. The people ate, and, by trial and error, they learned about the healing effects of these plants. They also learned about toxic effects. Today, there is a synthetic version of drugs to conserve their sources, for resource effectiveness, better dosage and control. We would learn about these sources of drugs in this lesson.

Primitive Medicine; Folklore, witchcraft, dreams, trances etc. Also from observing the reaction of some animals to particular herbs. (1) Through primitive medicine quinine was discovered from Africa; used for malaria and lime juice for Ascorbic acid/Vitamin C and this is used for scurvy and gum bleeding.
(2) Plants; Roots, bark, sap, leaves, flowers, seeds were sources for drugs e.g. Reserpine from Rauwolfia Vomitoria, Digitalis from foxglove, opium from the poppy plant.
(3) Animal sources; gave us hormones for replacement in times of deficiencies e.g. Insulin from the pancreases of pigs and cattle, Liver extracts for anaemia etc
(4) Minerals; including acids, bases and salts like potassium chloride
(5) Natural; OCCURRING SUBSTANCES like proteinsHappy Chance; Discovery is by chance not by any premeditated effort.
Synthesis of Substances; from natural products in the laboratory.

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