What Are the Most Common Side Effects of Antibiotics?

First line, second line antibiotics are the most effective. If these don't work anymore, then we have to go for later line antibiotics. These tend to be given through injections. There could be more side effects. And also more costly. So just not to mention that this is because of anti-microbial resistance,. Can you elaborate? Tell me what that is. We have to go there far back. To tackle these four classes of microorganisms, then you have four different kinds of anti-Microbial medications. For bacteria, you use antibacterial or antibiotics. For viruses, you'll be antivirals and so on.