SANFIX 400 mg contains Cefixime, a third-generation cephalosporin antibiotic. It is used to treat various bacterial infections, including respiratory tract infections, urinary tract infections, typhoid fever, and gonorrhea. Cefixime works by inhibiting bacterial cell wall synthesis, which leads to the destruction of bacteria. It is effective against a wide range of bacterial pathogens and is often used when infections are resistant to other antibiotics.