Fusidic acid is primarily used as an antibiotic to treat bacterial infections, particularly those caused by Staphylococcus species, including methicillin-resistant Staphylococcus aureus (MRSA). It is effective in treating skin infections such as impetigo, infected cuts, and wounds. Additionally, it is used in eye drops to treat bacterial conjunctivitis. Fusidic acid works by inhibiting bacterial protein synthesis, making it a valuable option for infections resistant to other antibiotics. It is often applied topically as a cream or ointment, but oral and intravenous forms are available for more severe infections. Its targeted action and low resistance development make it a reliable choice in clinical settings.