The Tylenol Trouble & the NAC comeback: Navigating Acetaminophen Toxicity in the PICU

In this episode of *PICU Doc on Call*, Drs. Monica Gray, Pradip Kamat, and Rahul Damania chat about a 17-year-old girl who ended up with acute liver failure after she intentionally took 22.5 grams of acetaminophen. She came in 48 hours later with really high transaminases and an INR of 5.5, so she was admitted to the PICU. The hosts break down how acetaminophen affects the body, walk through its four clinical stages, and discuss how to manage it—focusing on N-acetylcysteine as the primary antidote. They also touch on other treatments, like fomepizole. Thankfully, this patient recovered without needing a liver transplant, which really shows how important it is to have a team approach with intensivists, hepatologists, toxicologists, and psychiatry all working together.Show Highlights:Clinical case presentation of a 17-year-old girl with acetaminophen ingestion leading to acute liver failureMechanism of acetaminophen toxicity and its metabolic pathwaysEpidemiology of acetaminophen toxicity in pediatric populationsPathophysiology of acetaminophen overdose and its effects on liver functionClinical manifestations and progression of acetaminophen toxicity through various stagesEvaluation and diagnostic criteria for assessing acetaminophen toxicityManagement strategies for acetaminophen overdose, including the use of N-acetylcysteine (NAC).Discussion of adjunctive therapies such as fomepizole in severe cases.Importance of supportive care in managing complications of acute liver failureAn interdisciplinary approach to treatment involving various medical specialtiesReferences:Fuhrman & Zimmerman - Textbook of Pediatric Critical Care Chapter ***.Reference 1: 2019 Annual Report of the American Association of Poison Control Centers' National Poison Data System (NPDS): 37th Annual Report. Gummin DD, Mowry JB, Beuhler MC, Spyker DA, Brooks DE, Dibert KW, Rivers LJ, Pham NPT, Ryan ML. Clin Toxicol (Phila). 2020;58(12):1360.Reference 2: Pepin L, Matsler N, Fontes A, Heard K, Flaherty BF, Monte AA. Fomepizole Therapy for Acetaminophen-Induced Liver Failure in an Infant. Pediatrics. 2023 Oct 1;152(4):e2022061033. doi:10.1542/peds. 2022-061033. PMID: 37681263.Reference 3. Chiew AL, Buckley NA. Acetaminophen Poisoning. Crit Care Clin. 2021 Jul;37(3):543-561.Reference 4. Squires JE, Alonso EM, Ibrahim SH, Kasper V, Kehar M, Martinez M, Squires RH. North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition Position Paper on the Diagnosis and Management of Pediatric Acute Liver Failure. J Pediatr Gastroenterol Nutr. 2022 Jan 1;74(1):138-158. doi: 10.1097/MPG.0000000000003268. PMID: 34347674.