levofloxacin + cotrimoxazole

Levofloxacin + cotrimoxazole is a combination of two antibacterial agents used together in clinical practice, though not as a fixed-dose commercial product. Levofloxacin is a fluoroquinolone antibiotic that inhibits bacterial DNA gyrase and topoisomerase IV, enzymes essential for DNA replication, transcription, repair, and recombination. Cotrimoxazole is itself a combination of two antibiotics—sulfamethoxazole (a sulfonamide) and trimethoprim (a dihydrofolate reductase inhibitor)—which act synergistically to inhibit sequential steps in the bacterial folic acid synthesis pathway. Both drugs are broad-spectrum antibacterials with overlapping but distinct spectra of activity; they may be co-administered for certain infections where multidrug therapy is indicated or when resistance patterns necessitate dual coverage[4][9]. This combination does not have an established brand name or fixed-dose formulation but may be used off-label in complex infections.

Other names

levofloxacin and cotrimoxazolelevofloxacin and sulfamethoxazole/trimethoprim