Please consult your physician before taking any medication. Generic Name: DICLOXACILLIN - ORAL Pronounced: (dye-kloks-a-SIL-in) Dicloxacillin Oral Uses Dicloxacillin is used to treat a wide variety of bacterial infections. It is a penicillin-type antibiotic. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections. It will not work for viral infections (e.g., common cold flu). Unnecessary use or overuse of any antibiotic can lead to its decreased effectiveness. Dicloxacillin may also be used for purposes other than those listed in this medication guide.