N-Acetylcysteine Infusion Protocol for Traumatic Liver Injury

Rationale and Administration

The American Association for the Study of Liver Diseases recommends a loading dose of 150 mg/kg in 5% dextrose over 15 minutes, followed by a maintenance dose of 50 mg/kg over 4 hours, then 100 mg/kg over 16 hours for traumatic liver injury patients 1
NAC serves as a hepatoprotective agent in traumatic liver injury by replenishing glutathione stores and providing antioxidant effects, similar to its mechanism in acetaminophen toxicity 1, 2
NAC administration is recommended in any case of acute liver failure where hepatocyte damage is occurring or imminent, regardless of etiology 1

A loading dose of 150 mg/kg in 5% dextrose over 15 minutes, followed by a maintenance dose of 50 mg/kg over 4 hours, then 100 mg/kg over 16 hours is recommended for intravenous administration 1
For oral administration, a loading dose of 140 mg/kg by mouth or nasogastric tube diluted to 5% solution, followed by a maintenance dose of 70 mg/kg by mouth every 4 hours for 17 doses is recommended 1

Liver function tests, including AST, ALT, alkaline phosphatase, and total bilirubin, should be monitored during NAC treatment 1, 5
Coagulation parameters, including INR and PT, should be monitored during NAC treatment 1, 5
Adverse reactions, particularly allergic reactions, should be monitored and managed promptly, with discontinuation of infusion and administration of antihistamines and epinephrine as needed 1

NAC should be administered as early as possible following traumatic liver injury, with maximum benefit observed when initiated within 8 hours of injury 1, 2
NAC treatment should not be delayed while awaiting complete diagnostic workup in cases of severe traumatic liver injury 1
Potential drug interactions should be considered, particularly in polytrauma patients receiving multiple medications 5