Dioxicycline is a synthetic antibiotic belonging to the tetracycline class, which is used to treat a variety of bacterial infections. It works by inhibiting bacterial protein synthesis, thus preventing the growth and reproduction of bacteria. Like other tetracyclines, it may be effective against both Gram-positive and Gram-negative organisms. However, it is important to note that the use of dioxicycline can be limited by bacterial resistance and potential side effects.