The FDA has approved Kimyrsa (Melinta), a new IV formulation of the long-acting lipoglycopeptide antibiotic oritavancin, for treatment of adults with acute bacterial skin and skin structure infections caused by susceptible gram-positive bacteria. Orbactiv (Melinta), another IV formulation of oritavancin, was approved in 2014 for the same indication. Kimyrsa has a smaller infusion volume (250 mL vs 1 L) and a shorter infusion time (1 hour vs 3 hours) compared to Orbactiv (see Table 1).