Pediatric patients (n=10) suffering severe burn, admitted to the burn unit at Hennepin County Medical Center (Minneapolis, MN) meeting specific inclusion/exclusion criteria will be randomized daily to either intravenous magnesium sulfate (50 mg/kg, max 2 g) or placebo (normal saline) for up to 5 sedated burn dressing changes. Primary aims will be to evaluate safety/feasibility to guide a future larger randomized controlled trial.