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How are synthetic drugs different from drugs isolated from natural sources?
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A technician withdrawing deep-frozen cells for in vitro culture at a laboratory of a German pharmaceutical company.
The distinction between synthetic drugs and those isolated from natural sources lies primarily in their origin and the methods used to produce them.
- Natural Sources: Historically, medicinal compounds were derived directly from plants, animals, or minerals through processes of isolation and purification. By extracting pure active ingredientsāsuch as morphine from opium or quinine from cinchona barkāscientists were able to eliminate toxic impurities and administer accurate, consistent doses, which was not possible with raw plant materials.12
- Synthetic Drugs: These are constructed through chemical synthesis, where chemists build complex compounds from simpler ones. This approach allows for the creation of novel structures that do not occur in nature, as well as the replication of natural structures to confirm their validity.34
- Semisynthetic Drugs: These represent a hybrid approach, produced by the chemical alteration of a natural starting material to improve efficacy or safety.5
Today, chemical synthesis is the most significant source of therapeutic drugs. By understanding the chemical structures of natural compounds, chemists can synthesize related agents that retain therapeutic benefits while reducing harmful side effects, such as toxicity or flammability.62