What Are Antibiotics?

According to WebMD, Antibiotics are medicines that help stop infections caused by bacteria. They do this by killing the bacteria or by keeping them from copying themselves or reproducing. The word antibiotic means “against life.” … But most people use the term when they’re talking about medicine that is meant to kill bacteria.
Sounds good right?
Antibiotics kill both good and bad bacteria in the gut, and that is not a good thing. Antibiotic overuse: Stop the killing of beneficial bacteria, Martin Blaser
Prevention says that Antibiotics can do more harm than good, and they suggest 3 ways that this is so.
Prevention-3 ways antibiotics can do more harm than good
and if you look at Dr. Mercola, he states that Antibiotics are being overly subscribed, referring to a finding from the CDC that states 1/3 of antibiotics prescribed are unnecessary. Dr.Mercola