Читать книгу An Introduction to Testing for Drugs of Abuse - William E. Schreiber - Страница 12

A drug is a substance that produces a change in biological function when consumed. If you look up the word “drug,” you are likely to see two types of definitions:

 a substance intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease (Source: US Food and Drug Administration glossary of terms)

 an illegal substance that some people smoke, inject, etc. for the physical and mental effects it has (Source: Oxford Advanced American Dictionary).

These definitions highlight the therapeutic properties of drugs on the one hand, and their potential for inappropriate use on the other.