Name three examples of fourth generation fluoroquinolones.

• A. Besifloxacin, Moxifloxacin, Gatifloxacin
• B. Levofloxacin, Ciprofloxacin, Norfloxacin
• C. Gatifloxacin, Levofloxacin, Moxifloxacin
• D. Besifloxacin, Levofloxacin, Moxifloxacin

Answer: (A)

Fourth-generation fluoroquinolones expand activity against Gram-positive bacteria and have stronger anaerobic coverage while maintaining Gram-negative activity. Drugs that exemplify this generation include gatifloxacin, moxifloxacin, and besifloxacin. Since the question asks for three examples of fourth-generation fluoroquinolones, the trio of besifloxacin, moxifloxacin, and gatifloxacin fits all as fourth-generation agents. Levofloxacin is typically considered third-generation, and ciprofloxacin and norfloxacin are second-generation, so they don’t form a trio of fourth-generation drugs.