In an/ science there are two basic requirements — classification and nomenclature (names):
• Classification: drugs cannot be classified and named according to a single rational system because the requirements of chemists, pharmacologists, and doctors differ.
• Nomenclature: nor is it practicable always to present each drug under a single name because the formulations in which they are presented as prescribable medicines may vary widely and commercial considerations are too often paramount.
Generic (nonproprietary) names should be used as far as possible when prescribing except where pharmaceutical bioavailability differences have overriding importance.
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