Mefoxin is a brand name for the antibiotic cefoxitin. This medication belongs to the cephalosporin class of antibiotics used to treat bacterial infections. Cefoxitin is commonly used to treat infections caused by bacteria such as pneumonia, urinary tract infections, bone, joint, and skin infections. Some synonyms for mefoxin include other cephalosporins such as ceftriaxone, cefprozil, cefazolin, and cefdinir. Other antibiotics that may be used to treat similar infections include amoxicillin, penicillin, doxycycline, and azithromycin. It is important to consult with a healthcare provider to determine the most appropriate antibiotic for a particular infection.