1The doctor prescribed penicillin to treat the bacterial infection in her throat.
2Penicillin revolutionized the treatment of bacterial diseases in the early 20th century.
3Some people are allergic to penicillin, so they need alternative antibiotics.
4The discovery of penicillin by Alexander Fleming in 1928 was a major breakthrough in medicine.
5Overuse of penicillin has led to the development of antibiotic-resistant bacteria, making it less effective.