The above answers are all good ones. Actually there are hundreds of antibiotics. We get new ones continually. Cipro, for one, can cause devastating affects. we get immune to some of these drugs as well. Drug companies are "black boxing" usage of many. I am allergic to many which makes choices difficult. Check what the side affects are and what damage they can do to your body. sone they won't give me because they won't let my body fight the illness and the problem builds a resistance to the medication.