How are antibiotics different from antimicrobial drugs?

While the terms are often used interchangeably in casual conversation, there is a distinct technical difference between antimicrobial drugs and antibiotics.

Antimicrobial drugs is a broad, inclusive term for any chemical compound—whether synthetic, plant-derived, or produced by microorganisms—used to destroy or prevent the development of various infectious agents, including bacteria, fungi, viruses, protozoa, and helminths.12

Antibiotics, strictly speaking, refer only to a specific subset of these agents that are used to kill or inhibit the growth of bacteria.1

Key distinctions include:
* Scope: Antimicrobials cover a wide range of pathogens (bacteria, fungi, viruses, etc.), whereas antibiotics are limited to bacterial targets.12
* Composition: While some antibiotics are natural metabolic products of microorganisms, the category of antimicrobial drugs also explicitly encompasses synthetic chemicals and plant-derived substances.12

It is important to note that because antimicrobial agents are vital for public health, the rise of antibiotic resistance due to the indiscriminate use of these drugs is a significant concern that requires responsible medical stewardship.2