What are antibiotics? Give Example.

Hint: The word antibiotics means “against life”. A drug that is used for treating bacterial infections. Antibiotics don’t produce any effect on viral infections. An antibiotic is a substance produced by one microorganism that selectively inhibits the growth of another.

Complete answer:
Antibiotics are drugs which are used for bacterial infections. They do this by killing the bacteria.
Most bacteria that sleep in our body are harmless. Some are even helpful. Still, bacteria can infect almost any organ. Fortunately, antibiotics can even help.
There are differing types of antibiotics, which add one among two ways-
A bacteria antibiotic kills the bacteria. These drugs usually produce their effect on the formation of the bacterial cell membrane or its cell contents. For example: A bacteriostatic stops bacteria from multiplying from its growth.
Example: Penicillin and quinolones.

Additional information:
Antibiotics include a range of powerful drugs and are used to treat diseases caused by bacteria. Alexander Fleming discovered penicillin, the first natural antibiotic in 1928, Fleming predicted the rise of antibiotic resistance.
Antibiotics either kill or slow the growth of bacteria side effects can include the stomach pain and nausea, white blood cells attack harmful bacteria and even if symptoms do occur, the immune system can usually cope and fight off the injection.
The number of harmful bacteria is excessive and the immune system cannot fight them all.

Note:
Antibiotics are not effective against viruses such as the common cold, drugs which inhibit viruses are termed antiviral drugs rather than antibiotics. Antibiotics are useful in this scenario some antibiotics attack aerobic bacteria while others work against anaerobic bacteria, some people may develop an allergic reaction to antibiotics especially penicillin.