Gatifloxacin is a fourth-generation fluoroquinolone used for which condition?

• A. Fourth-generation fluoroquinolone
• B. Beta blocker
• C. Corticosteroid
• D. Carbonic anhydrase inhibitor

Answer: (A)

Gatifloxacin is an antibiotic in the fluoroquinolone family, specifically a fourth-generation agent. This classification is about what the drug is, not a disease it treats. In ophthalmology, such fourth-generation fluoroquinolones are used to treat bacterial eye infections like conjunctivitis and keratitis because they have broad-spectrum activity against common ocular pathogens and penetrate eye tissues well. The other options point to completely different drug classes—beta blockers, corticosteroids, and carbonic anhydrase inhibitors—which do not describe gatifloxacin. So identifying it by its correct drug class, a fourth-generation fluoroquinolone, is the best fit.