Acetaminophen Toxicity Differential Diagnoses
- Author: Susan E Farrell, MD; Chief Editor: Asim Tarabar, MD more...
Diagnostic Considerations
The diagnosis of acetaminophen (APAP) ingestion and potential toxicity is based on obtaining a history of APAP ingestion and the measurement of a potentially toxic serum APAP concentration. Acetaminophen ingestion should be considered as a potential cause of illness in patients who present with hepatic dysfunction of unknown etiology.
The differential diagnosis for the clinical presentation of a patient with suspected APAP toxicity includes such conditions as vomiting of unclear etiology, hepatic failure and acute liver failure of unknown etiology, and hepatorenal syndrome.
Differential Diagnoses
- Acute Tubular Necrosis
- Amatoxin Toxicity in Emergency Medicine
- Bacterial Gastroenteritis
- Ethanol-Induced Hepatitis
- Other Hepatotoxic Exposures
- Pancreatitis
- Pediatric Amatoxin Toxicity
- Peptic Ulcer Disease
- Viral Gastroenteritis
- Viral Hepatitis in Emergency Medicine
US Food and Drug Administration. June 29-30, 2009: Joint meeting of the Drug Safety and Risk Management Advisory Committee with the Anesthetic and Life Support Drugs Advisory Committee and the Nonprescription Drugs Advisory Committee: meeting announcement. Available at http://www.fda.gov/AdvisoryCommittees/Calendar/ucm143083.htm. Accessed August 5, 2009.
US Food and Drug Administration. Organ-specific warnings: internal analgesic, antipyretic, and antirheumatic drug products for over-the-counter human use. Federal Register. 2009 Apr 29;74(81). Available at http://edocket.access.gpo.gov/2009/pdf/E9-9684.pdf. Accessed August 5, 2009.
US Food and Drug Administration. Acetaminophen information. Available at http://www.fda.gov/Drugs/DrugSafety/InformationbyDrugClass/ucm165107.htm. Accessed August 18, 2011.
Mitchell I, Bihari D, Chang R, Wendon J, Williams R. Earlier identification of patients at risk from acetaminophen-induced acute liver failure. Crit Care Med. Feb 1998;26(2):279-84. [Medline].
Schmidt LE, Dalhoff K. Serum phosphate is an early predictor of outcome in severe acetaminophen-induced hepatotoxicity. Hepatology. Sep 2002;36(3):659-65. [Medline].
Bernal W, Donaldson N, Wyncoll D, Wendon J. Blood lactate as an early predictor of outcome in paracetamol-induced acute liver failure: a cohort study. Lancet. Feb 16 2002;359(9306):558-63. [Medline].
Crowell C, Lyew RV, Givens M, Deering SH. Caring for the mother, concentrating on the fetus: intravenous N-acetylcysteine in pregnancy. Am J Emerg Med. Jul 2008;26(6):735.e1-2. [Medline].
James LP, Capparelli EV, Simpson PM, Letzig L, Roberts D, Hinson JA, et al. Acetaminophen-associated hepatic injury: evaluation of acetaminophen protein adducts in children and adolescents with acetaminophen overdose. Clin Pharmacol Ther. Dec 2008;84(6):684-90. [Medline].
Schmidt LE, Dalhoff K. Serum phosphate is an early predictor of outcome in severe acetaminophen-induced hepatotoxicity. Hepatology. Sep 2002;36(3):659-65. [Medline].
Chyka PA, Seger D, Krenzelok EP, Vale JA. Position paper: Single-dose activated charcoal. Clin Toxicol (Phila). 2005;43(2):61-87. [Medline].
[Guideline] Wolf SJ, Heard K, Sloan EP, Jagoda AS. Clinical policy: critical issues in the management of patients presenting to the emergency department with acetaminophen overdose. Ann Emerg Med. Sep 2007;50(3):292-313. [Medline]. [Full Text].
[Guideline] Dart RC, Erdman AR, Olson KR, et al. Acetaminophen poisoning: an evidence-based consensus guideline for out-of-hospital management. Clin Toxicol (Phila). 2006;44(1):1-18. [Medline]. [Full Text].
Betten DP, Cantrell FL, Thomas SC, Williams SR, Clark RF. A prospective evaluation of shortened course oral N-acetylcysteine for the treatment of acute acetaminophen poisoning. Ann Emerg Med. Sep 2007;50(3):272-9. [Medline].
Whyte IM, Francis B, Dawson AH. Safety and efficacy of intravenous N-acetylcysteine for acetaminophen overdose: analysis of the Hunter Area Toxicology Service (HATS) database. Curr Med Res Opin. Oct 2007;23(10):2359-68. [Medline].
Spiller HA, Winter ML, Klein-Schwartz W, Bangh SA. Efficacy of activated charcoal administered more than four hours after acetaminophen overdose. J Emerg Med. Jan 2006;30(1):1-5. [Medline].
Tsai CL, Chang WT, Weng TI, Fang CC, Walson PD. A patient-tailored N-acetylcysteine protocol for acute acetaminophen intoxication. Clin Ther. Mar 2005;27(3):336-41. [Medline].
Zein JG, Wallace DJ, Kinasewitz G, Toubia N, Kakoulas C. Early anion gap metabolic acidosis in acetaminophen overdose. Am J Emerg Med. Sep 2010;28(7):798-802. [Medline].

