ATC Group: J01CF Beta-lactamase resistant penicillins

Cloxacillin is a semi-synthetic beta-lactamase resistant penicillin with activity against gram-negative and gram-positive bacteria including beta-lactamase producing staphylococci. Cloxacillin acts by interfering with the formation of new bacterial cell wall by dividing organisms.

Dicloxacillin is a penicillinase stable, acid-stable semisynthetic penicillin. It inhibits bacterial cell wall synthesis and has bactericidal effect on penicillin susceptible bacteria in the growth phase.

Flucloxacillin is an isoxazolyl penicillin of the β-lactam group of antibiotics which exerts a bactericidal effect upon many Gram-positive organisms including β-lactamase-producing staphylococci and streptococci.