PMID- 36273750 OWN - NLM STAT- MEDLINE DCOM- 20221206 LR - 20221206 IS - 1946-9837 (Electronic) IS - 1946-9837 (Linking) VI - 51 DP - 2022 Nov-Dec TI - Anaphylaxis due to First-Time Intravenous Infusion of N-Acetylcysteine in a Dog. PG - 100734 LID - S1938-9736(22)00107-6 [pii] LID - 10.1016/j.tcam.2022.100734 [doi] AB - A 4-year-old female spayed Pomeranian was referred to the emergency service for intermittent trouble breathing and an enlarged liver found on ultrasound. A severe mixed hepatopathy was found on bloodwork, and ultrasound-guided liver aspirates showed marked hepatocellular vacuolar changes and rare neutrophils. An intravenous (IV) loading dose of n-acetylcysteine (NAC) was given for the first time in this patient, and immediately after the infusion the patient collapsed, became hypotensive, hypothermic, tachycardic, and developed gallbladder wall edema. Treatment for anaphylaxis was immediately initiated with IV fluids, an epinephrine bolus and then continuous rate infusion, diphenhydramine, and famotidine. Clinical signs resolved within an hour of treatment with no recurrence. The hepatic enzymopathy improved, and the patient was ultimately diagnosed with a steroid hepatopathy based on laparoscopic liver biopsies. Anaphylaxis caused by first-time administration of IV NAC in a dog has not previously been reported, though it is known to occur in humans. Based on this report, it would be clinically wise to give careful consideration before prescribing NAC in cases where it is not a specific antidote or if other options are available, and to closely monitor the patient during and immediately after administration. CI - Copyright (c) 2022 Elsevier Inc. All rights reserved. FAU - Gregory, Elizabeth A AU - Gregory EA AD - Department of Small Animal Clinical Sciences, Veterinary Medical Center, Michigan State University, East Lansing, MI, USA. FAU - Binagia, Erin M AU - Binagia EM AD - Department of Small Animal Clinical Sciences, Veterinary Medical Center, Michigan State University, East Lansing, MI, USA. Electronic address: embinagiadvm@gmail.com. LA - eng PT - Case Reports DEP - 20221020 PL - United States TA - Top Companion Anim Med JT - Topics in companion animal medicine JID - 101465592 RN - WYQ7N0BPYC (Acetylcysteine) RN - 8GTS82S83M (Diphenhydramine) RN - YKH834O4BH (Epinephrine) SB - IM MH - Humans MH - Female MH - Dogs MH - Animals MH - Acetylcysteine/therapeutic use MH - *Anaphylaxis/chemically induced/drug therapy/veterinary MH - Infusions, Intravenous/veterinary MH - Diphenhydramine/therapeutic use MH - Epinephrine MH - *Dog Diseases/chemically induced/drug therapy OTO - NOTNLM OT - N-acetylcysteine OT - anaphylactoid OT - anaphylaxis OT - canine OT - hypersensitivity OT - nonimmunologic EDAT- 2022/10/24 06:00 MHDA- 2022/12/07 06:00 CRDT- 2022/10/23 19:36 PHST- 2022/04/27 00:00 [received] PHST- 2022/08/23 00:00 [revised] PHST- 2022/10/14 00:00 [accepted] PHST- 2022/10/24 06:00 [pubmed] PHST- 2022/12/07 06:00 [medline] PHST- 2022/10/23 19:36 [entrez] AID - S1938-9736(22)00107-6 [pii] AID - 10.1016/j.tcam.2022.100734 [doi] PST - ppublish SO - Top Companion Anim Med. 2022 Nov-Dec;51:100734. doi: 10.1016/j.tcam.2022.100734. Epub 2022 Oct 20.