Cyanide Poisoning Risk

Cyanide poisoning risk refers to the potential for toxic exposure to cyanide, a rapidly acting chemical that can disrupt cellular energy production and become life-threatening. Cyanide binds cytochrome c oxidase in mitochondrial electron transport chains, preventing cells from using oxygen despite adequate oxygen delivery and producing cellular hypoxia, metabolic acidosis, and tissue injury. In pharmacology, understanding this mechanism supports risk assessment after smoke inhalation, industrial exposure, or ingestion and helps guide urgent clinical management. Recognition of exposure patterns and physiological effects informs selection of antidotes, including hydroxocobalamin, while improving preparedness for accidental, occupational, and emergency exposures.

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JoVE Core - Pharmacology

Prevention of Further Absorption of Poison

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2023

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...

Enhanced Elimination of Poison

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2023

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...

Anticholinesterase Agents: Poisoning and Treatment

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2023

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 Scenarios

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2026

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 Strategies

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2026

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...

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