This cannot be answered because there are thousands of antibiotics and new antibiotics are grown daily some of the commonly antibiotics are- Beta Lactams: This is the largest group of antibiotics, and there are four subdivisions within this group: 1. Penicillins: penicillin, amoxicillin, cloxacillin etc.
2. Cephalosporins: cefazolin, cefuroxime, cefotaxime, ceftazidime, cefepime, cefpirome etc.
3. Monobactams: a relatively small group – aztreonam