Journal of The Korean Society of Clinical Toxicology

Delayed death after chlorfenapyr poisoning: Jang Young Lee; J Korean Soc Clin Toxicol. 2021;19(1):51-54. Published online June 30, 2021; DOI: https://doi.org/10.22537/jksct.2021.19.1.51

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Chlorfenapyr is a widely used insecticide, that is very lethal if ingested. It exhibits delayed toxicity in which there are few symptoms at first which suddenly worsen after a few days. A 66-year-old female patient ingested about 90 mL of chlorfenapyr liquid hydrating agent (Chlofenapyr 10%) and showed stable vital signs with no specific symptoms and findings other than a mild fever, vomiting, and nausea. From the 3rd day of ingestion, creatine kinase was high, and rhabdomyolysis was suspected. From the 4th day of ingestion, pancreatic enzymes began to gradually increase. A diffusion-weighted image showed a multifocal high signal intensity in the white matter and corpus callosum area. On the 8th day after ingestion, she suffered a high fever and a heart attack and died. Thus, if a patient is suspected of taking chlorfenapyr, he/she needs active treatment and monitoring even if he/she does not exhibit any symptoms.

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Understanding Chlorfenapyr Toxicity: An Overview of Acute Human Exposure and Clinical Outcomes
Dalia Alsaied Moustafa Ahmed, Nermin Mahmoud Emam, Mohamed Moharram Badawy
Journal of Applied Toxicology.2026;[Epub] CrossRef
Toxicological Review of an Uncoupler, Chlorfenapyr
Sun Cheun Kim
Korean Journal of Legal Medicine.2025; 49(2): 35. CrossRef
A Fatal Case of Chlorfenapyr Poisoning and the Therapeutic Implications of Serum Chlorfenapyr and Tralopyril Levels
Ming-Jin Chung, Yan-Chiao Mao, Chia-Tien Hsu, Mu-Chi Chung, Tsai-Jung Wang, Tung-Min Yu, Po-Yu Liu, Pin-Kuei Fu, Chia-Ming Hsieh
Medicina.2022; 58(11): 1630. CrossRef

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