Drugs mean ()

Substances used to prevent and diagnose diseases.

According to the query essence bar network, the drug is () A. A chemical substance. B. chemical substances that can interfere with cell metabolic activities. C. substances that can affect the physiological functions of the body. D. substances used to prevent and diagnose diseases. E. substances with nutrition, nourishing, health care and rehabilitation functions. The answer is D, so it is a substance used to prevent and diagnose diseases.

Drugs are substances used to prevent, treat and diagnose diseases. Theoretically speaking, drugs refer to all chemicals that can affect the physiological functions of organs and the metabolic activities of cells, belonging to the category of drugs, including contraceptives.