In 25 paediatric patients ranging in age from 5 to 16 years and receiving the 2 mg/ kg bid dose into the upper arm, anterior thigh or abdomen, the mean steady-state AUC was 54.3 ± 23.5 μ g*h/ ml, Cmax was 6.14 ± 2.48 μ g/ ml, and Ctrough was 2.93 ± 1.55 μ g/ ml.