Moxalactam is a β-lactam antibiotic in the cephalosporin class. It is classified as an oxacephem, as oxygen replaces sulfur in position one of the dihydrothiazolidine ring.{25856} While moxalactam inhibits most commonly occurring gram positive, gram negative, and anaerobic bacteria, it is ineffective against methicillin-resistant S. aureus and Enterococci.{25856} In certain situations, this antibiotic impairs normal hemostasis, most commonly manifested as a prolonged bleeding time.{25855}