1. Health
You can opt-out at any time. Please refer to our privacy policy for contact information.

Antibiotics

By

Updated April 15, 2009

Definition:

Antibiotics are a class of medications that fight bacterial infections. They either kill the bacteria or prevent it from reproducing.

Antibiotics are not effective against viruses or viral infections (such as the common cold and the flu), and using them for these illnesses can lead to antibiotic resistance.

  1. About.com
  2. Health
  3. Cold & Flu
  4. Glossary
  5. Cold/Flu Terms A - E
  6. Antibiotics - What Are Antibiotics

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.