Levoaid 500 contains levofloxacin 500 mg, which is indicated to treat nosocomial pneumonia, acute bacterial sinusitis, complicated skin and skin structure infections, chronic bacterial prostatitis, complicated urinary tract infections, inhalational anthrax, and acute pyelonephritis. Levofloxacin is a broad-spectrum antibiotic that works by inhibiting DNA gyrase and topoisomerase IV, enzymes necessary for bacterial cell division.