Fluxacillin is a semisynthetic penicillin antibiotic that is primarily used to treat infections caused by penicillinase-producing staphylococci. It works by inhibiting bacterial cell wall synthesis, making it effective against a range of Gram-positive bacteria. Fluxacillin is often used in clinical settings for treating skin infections, respiratory tract infections, and other bacterial infections. It is important to note that fluxacillin is not commonly used in all parts of the world and may be less familiar than other penicillins.