Michael, Adam P., Mostafa, Ahmed, Cooper, Joyce, Grice, Jeffrey, Roberts, Michael S., and Isbister, Geoffrey K. (2015) The pharmacokinetics and pharmacodynamics of severe aldicarb toxicity after overdose. Clinical Toxicology, 53 (7). pp. 633-635.

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Abstract

Objective: To describe the clinical effects, pharmacokinetics, and pharmacodynamics of plasma and acetylcholinesterase in an aldicarb overdose.

Case report: A 57-year-old female was found unconscious and incontinent of urine after ingesting aldicarb. She was bradycardic, hypotensive, hypersalivating, clammy, had small pupils, and generalized weakness. She was intubated, ventilated, and treated with large atropine doses (50 mg and 20 mg/h infusion) and adrenaline. She improved hemodynamically over 24 h, but remained comatose for another 24 h, before recovering without sequela. Aldicarb concentration at admission was 2.18 μg/ml and concentration-time data best fitted a two compartmental model with first order absorption and a time of ingestion 4.5 h preadmission. The half-life of distribution was 0.4 h and half-life of elimination, 13 h. Plasma cholinesterase concentration at admission was 0.3 kU/L (Reference range[RR]:4.3-10.6 kU/L) and red cell cholinesterase was 10 U/gHb (RR:38-66 U/gHb). The IC50 was 0.15 μg/ml and 0.26 μg/ml for plasma and red cell cholinesterase, respectively.

Discussion: Aldicarb poisoning causes rapid onset severe toxicity with muscarinic and nicotinic excess, seizures, and decreased consciousness. Cholinesterases rapidly recover once aldicarb concentrations decrease and precede clinical recovery.

Item ID:	73238
Item Type:	Article (Case Study)
ISSN:	1556-9519
Keywords:	Carbamate; PK; Respiratory support.
Copyright Information:	© The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/
Date Deposited:	10 Jul 2024 01:06
FoR Codes:	32 BIOMEDICAL AND CLINICAL SCIENCES > 3214 Pharmacology and pharmaceutical sciences > 321402 Clinical pharmacology and therapeutics @ 50% 32 BIOMEDICAL AND CLINICAL SCIENCES > 3214 Pharmacology and pharmaceutical sciences > 321407 Toxicology (incl. clinical toxicology) @ 50%
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