Nadifloxacin is a fluorinated fluoroquinolone antibiotic with broad-spectrum activity against Gram-positive and Gram-negative bacteria, especially Propionibacterium acnes. It also shows antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA). Nadifloxacin is capable of treating green nail syndrome caused by Pseudomonas aeruginosa.