What are antibiotics? What precautions must be taken while taking antibiotics?

Explanation

Medicines taken to kill or stop the growth of harmful or disease causing microbes in human body are called antibiotics. Antibiotics are very useful as only antibiotics can save us from many microbial infections and diseases. Antibiotics are made from fungi and bacteria. Alexander Fleming discovered the first antibiotic called penicillin in 1929. Now-a-days a number of antibiotics are used to cure a variety of human and animal diseases. Streptomycin, tetracycline, erythromycin, etc. are some commonly used antibiotics.
Antibiotics should only be taken when advised by a qualified physician. They should only be taken when needed, otherwise, they become less effective for future use.