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Related Concept Videos

Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

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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...
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Prevention of Further Absorption of Poison01:14

Prevention of Further Absorption of Poison

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In cases of acute poisoning, the primary objective is to prevent further absorption of the toxic substance into the body. Immediate interventions using various decontamination techniques targeting the gastrointestinal (GI) tract can achieve this. Decontamination is crucial to prevent poison from entering the systemic circulation, which involves washing affected areas with water and mild soap and removing contaminated clothing. Once external decontamination is done, attention must be turned to...
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Toxic Reactions: Overview01:26

Toxic Reactions: Overview

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When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
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Physical Properties of Amines01:26

Physical Properties of Amines

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Amines with low molecular weight are usually gaseous at room temperature, while those with high molecular weight are liquid or solids in nature. Usually, low molecular weight amines have a rotten fish-like smell. Diamines typically have a pungent smell. For instance, cadaverine and putrescine, depicted in Figure 1, are two molecules responsible for decaying tissue.
4.0K
Enhanced Elimination of Poison01:26

Enhanced Elimination of Poison

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Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
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Antidotes01:17

Antidotes

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Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
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Related Experiment Video

Updated: Dec 29, 2025

Evaluating the Effect of Pesticides on the Larvae of the Solitary Bees
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Evaluating the Effect of Pesticides on the Larvae of the Solitary Bees

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Pyrethroid Poisoning.

Atul M Ramchandra1, Binila Chacko1, Peter J Victor1

  • 1Department of Medical Intensive Care Unit, Christian Medical College and Hospital, Vellore, Tamil Nadu, India.

Indian Journal of Critical Care Medicine : Peer-Reviewed, Official Publication of Indian Society of Critical Care Medicine
|February 6, 2020
PubMed
Summary
This summary is machine-generated.

Pyrethroid insecticides, while generally safe, can cause poisoning in humans. Symptoms vary by pyrethroid type, but supportive care usually leads to recovery.

Keywords:
InsecticidesPoisoningPyrethroid

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Area of Science:

  • Toxicology
  • Environmental Health

Background:

  • Pyrethroids are widely used insecticides with selective toxicity.
  • Despite low human toxicity, occupational and intentional pyrethroid poisoning cases are reported.

Purpose of the Study:

  • To describe the clinical presentations and management of pyrethroid poisoning.

Main Methods:

  • Review of classical syndromic presentations of pyrethroid toxicity.
  • Discussion of treatment strategies for pyrethroid poisoning.

Main Results:

  • Type I pyrethroids cause tremors (Type I syndrome).
  • Type II pyrethroids, with a cyano group, cause choreo-athetosis and salivation (Type II syndrome).
  • Mega-dose or mixed poisonings increase toxicity and mortality risk.

Conclusions:

  • Pyrethroid poisoning presents with distinct syndromes based on pyrethroid type.
  • Supportive and symptomatic treatment is key.
  • Most patients experience favorable outcomes with appropriate care.