1 mg/kg IV every 8 to 12 hours for 1 to 5 days has been studied in premature and term neonates (combined n from 3 studies = 89, gestational age 23 to 40 weeks). An initial loading dose of 2 mg/kg IV was used in 1 retrospective study and another prospective, observational study used a higher maintenance dose of 3 to 6 mg/kg/day IV divided 2 to 4 times daily in a small number of patients (n = 5) with severe capillary leak syndrome and/or previous steroid treatment. In the largest prospective, randomized, placebo controlled study (n = 48, gestational age to weeks), patients receiving hydrocortisone 1 mg/kg IV every 8 hours for 5 days required significantly less vasopressor support (lower doses of dopamine and dobutamine, shorter duration of vasopressor therapy, and fewer patients requiring more than 1 vasopressor) compared to patients receiving placebo. The trend of the average mean arterial blood pressure (MAP) was also significantly higher in patients receiving hydrocortisone compared to patients receiving placebo.
The anti-infective components in the combination are included to provide action against specific organisms susceptible to them. Polymyxin B sulfate and neomycin sulfate together are considered active against the following microorganisms: Staphylococcus aureus, Escherichia coli , Haemophilus influenzae, Klebsiella Enterobacter species, Neisseria species, and Pseudomonas aeruginosa . The product does not provide adequate coverage against Serratia marcescens and streptococci, including Streptococcus pneumoniae .