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Related Concept Videos

Drug toxicity: Idiosyncratic Reactions01:16

Drug toxicity: Idiosyncratic Reactions

Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...
Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is slower than the...
Pharmaceutical Poisoning: Potential Scenarios01:26

Pharmaceutical Poisoning: Potential Scenarios

Pharmaceutical poisoning can occur through various channels, impacting an estimated 2 million hospitalized patients in the U.S. annually with serious adverse drug responses. These scenarios encompass both therapeutic uses, such as drug toxicity, where even standard dosages can lead to severe central nervous system depression, and non-therapeutic exposures, including accidental ingestion by children, and environmental and occupational exposures.Unintentional poisonings often involve exploratory...
Pharmaceutical Poisoning: Treatment Strategies01:26

Pharmaceutical Poisoning: Treatment Strategies

Treatment strategies for poisoning are a critical aspect of emergency medicine, focusing on preventing the absorption of toxins and enhancing their elimination. When a poisoning incident occurs, the first response is to halt exposure and decontaminate the patient, particularly through gastrointestinal (GI) methods if the poison was ingested.Gastrointestinal Decontamination Techniques:Activated charcoal is the cornerstone of GI decontamination. It works through adsorption, binding the toxin to...
Drug Toxicity: Risk factors01:24

Drug Toxicity: Risk factors

Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
Drug Toxicity: Overview01:00

Drug Toxicity: Overview

Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...

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Related Experiment Video

Updated: Jul 4, 2026

A Model of Self-limited Acute Lung Injury by Unilateral Intra-bronchial Acid Instillation
07:40

A Model of Self-limited Acute Lung Injury by Unilateral Intra-bronchial Acid Instillation

Published on: August 30, 2019

Accidental isoniazid poisoning--a report.

R L Agrawal1, N C Dwivedi, Manju Agrawal

  • 1Department of T.B. and Chest Diseases, Medical College, Allahabad.

The Indian Journal of Tuberculosis
|June 4, 2008
PubMed
Summary

Accidental Isoniazid overdose in eight patients caused observable clinical and EEG changes but was successfully managed. All patients recovered fully without long-term Isoniazid side effects.

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Last Updated: Jul 4, 2026

A Model of Self-limited Acute Lung Injury by Unilateral Intra-bronchial Acid Instillation
07:40

A Model of Self-limited Acute Lung Injury by Unilateral Intra-bronchial Acid Instillation

Published on: August 30, 2019

Inducing Acute Liver Injury in Rats via Carbon Tetrachloride (CCl4) Exposure Through an Orogastric Tube
06:12

Inducing Acute Liver Injury in Rats via Carbon Tetrachloride (CCl4) Exposure Through an Orogastric Tube

Published on: April 28, 2020

Area of Science:

  • Clinical Toxicology
  • Neurophysiology

Background:

  • Isoniazid is a primary treatment for tuberculosis.
  • Accidental overdose can lead to significant toxicity.

Purpose of the Study:

  • To describe the clinical manifestations, electroencephalogram (EEG) changes, and management of Isoniazid overdose.
  • To assess patient outcomes following accidental Isoniazid overdose.

Main Methods:

  • Retrospective case series of eight patients with accidental Isoniazid overdose.
  • Clinical evaluation, including neurological assessment and EEG monitoring.
  • Analysis of treatment protocols and patient recovery.

Main Results:

  • Patients exhibited specific clinical symptoms and EEG abnormalities post-overdose.
  • All eight patients received appropriate management and survived.
  • No residual neurological or clinical effects were observed in any patient.

Conclusions:

  • Isoniazid overdose presents with distinct clinical and EEG findings.
  • Prompt management leads to complete recovery without lasting sequelae.
  • This study highlights the importance of monitoring and timely intervention in Isoniazid toxicity.