Antibiotics are Chemicals that stop the growth of bacteria. The most important thing you should know about Antibiotics is that Antibiotics work only against infections caused by bacteria. They are used for treatment of different type of infections like ear infections, bronchitis, lung inflammation, urinary tract infections, gonorrhea, and others. But they don't work against any infections caused by viruses like colds, the flu, and most coughs and sore throats.

Note that only doctor can indicate whether you need Antibiotics or not.