With advances in medicinal chemistry many antibiotics are now modified chemically from their original form found in nature. In addition, some modern antibiotics have been created ...
Antibiotics ... National Institutes of Health. The primary NIH organization for research on Antibiotics is the National Institute of Allergy and Infectious Diseases
The Food and Drug Administration imposed the government's most urgent safety warning on Cipro, Levaquin, Avelox and many other flouroquinolone antibiotics.