head JofIMAB
Journal of IMAB - Annual Proceeding (Scientific Papers)
Publisher: Peytchinski Publishing Ltd.
ISSN: 1312-773X (Online)
Issue: 2022, vol. 28, issue3
Subject Area: Medicine
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DOI: 10.5272/jimab.2022283.4487
Published online: 28 July 2022

Case report
J of IMAB. 2022 Jul-Sep;28(3):4487-4490
ACUTE IZONIAZID POISONING WITH PRESENTATION OF A CLINICAL CASE
Evgenia Barzashka1, 2ORCID logo, Vasil Atanasov3, 4ORCID logo, Teodora Valova5ORCID logo Corresponding Autoremail, Olimpiada Atmazhova1ORCID logo,
1) Clinic of Toxicology, UMHAT "Dr G. Stranski", Medical University – Pleven, Bulgaria.
2) Department of Social and Pharmaceutical Activities, Medical University – Pleven, Bulgaria.
3) Department of Clinical Toxicology, Forensic Toxicology Laboratory, Military Medical Academy, Sofia, Bulgaria.
4) Department of Analytical Chemistry, Faculty of Chemistry and Pharmacy, Sofia University "St. Kliment Ohridski", Sofia, Bulgaria.
5) Department of Medico-diagnostic Investigations, Medical University – Pleven, Bulgaria.

ABSTRACT:
Rimicid or isonide a group of medications which belong to anti-tuberculosis medicaments. The active substance isoniazid is used to treat pulmonary and extrapulmonary forms of tuberculosis, as well as prophylaxis in case of contact with infected individuals.
Isoniazid is rapidly absorbed, reaching a maximum serum concentration in 2 hours, and penetrates all body fluids. The volume of distribution is approximately 0.6 l/kg.
Isoniazid causes pyridoxine deficiency in two ways:
- by hydrazones, isoniazid metabolites inhibit the pyridoxal kinase, which converts pyridoxine to the active form, pyridoxal-5-phosphate, and
- pyridoxine deficiency disrupts the synthesis and metabolism of GABA, the main inhibitory mediator of the central nervous system.
Isonicotinic acid poisoning metabolism is subject to individualized factors, and in some people, this metabolism can be in a significantly slower.
A clinical case of poisoning with 30 tablets of Rimicid by a 16-year-old girl suicidal attempt was presented. The results of the TC analysis confirm intoxication with the drug, and the retrospective assessment of the concentration over a past period of time using the elimination half-life has revealed an extremely high dose of ingested isoniazid.

Keywords: isoniazid, pyridoxine, poisoning,

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Please cite this article as: Barzashka E, Atanasov V, Valova T, Atmazhova O. Acute Izoniazid Poisoning with Presentation of a Clinical Case. J of IMAB. 2022 Jul-Sep;28(3):4487-4490.
DOI: 10.5272/jimab.2022283.4487

Corresponding AutorCorrespondence to: Teodora Valova, Department of Medico-diagnostic Investigations, Medical University – Pleven; 1, Sv. Kliment Ohridski Str., 5800 Pleven, Bulgaria; E-mail: Teodora.Valova@mu-pleven.bg

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Received: 18 January 2022
Published online: 28 July 2022

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