Average plasma concentrations of ertapenem following a single 30 minute intravenous infusion of a 15 mg/ kg (up to a maximum dose of 1 g) dose in patients 2 to 12 years of age were 113.2 micrograms/ ml (Cmax) at 0.5 hour postdose (end of infusion), 12.8 micrograms/ ml at 6 hour postdose, and 3.0 micrograms/ ml at 12 hour postdose.