1. Penicillin
... thereafter. Penicillin is still widely used although many strains of bacteria have grown resistant to the drug. The discovery of Penicillin led to a whole new string of antibiotics. Some synthetic derivatives of Penicillin include ampicillin, methicillin, and oxacillin. These have become more widely used since unfortunately some bacteria have become resistant to Penicillin. In 1944 Sir Alexander Fleming received the title ... ...
- Word Count: 1016
- Approx Pages: 4
- Grade Level: High School