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Toxic Reactions: Overview

Toxic Reactions: Overview

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,...

Prevention of Further Absorption of Poison

Prevention of Further Absorption of Poison

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...

Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids

Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids

In the complex environment of the gastric lumen, excessive acid secretion can lead to the formation or worsening of ulcers within the delicate mucosal layer. Antacids, such as sodium bicarbonate and calcium carbonate, provide relief by neutralizing this acid, transforming it into harmless salt and water. This neutralization process raises the gastric pH from a highly acidic level of 1 to a more basic 3-4, reducing the acidity within the stomach.
However, this neutralization reaction between...

Anticholinesterase Agents: Poisoning and Treatment

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...

Antidotes

Antidotes

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,...

Enhanced Elimination of Poison

Enhanced Elimination of Poison

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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Related Experiment Video

Updated: Jun 26, 2025

Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions

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Salicylate Poisoning and Rebound Toxicity.

Sindhu Harika Peketi¹, Pratap Kumar Upadrista¹, Bair Cadet²

¹Internal Medicine, Nassau University Medical Center, East Meadow, USA.

|May 15, 2024

Summary

Salicylate poisoning requires careful management of acid-base balance and serum levels. Hemodialysis is crucial for severe cases, especially with rebound toxicity, to enhance salicylate elimination.

Keywords:

acetylsalicylic acid overdose aspirin overdose hemodialysis rebound toxicity salicylate poisoning

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Area of Science:

Toxicology
Emergency Medicine
Nephrology

Background:

Salicylate toxicity presents with diverse symptoms and necessitates expert diagnosis and treatment.
Effective management strategies are vital due to the potential for rapid patient deterioration.

Observation:

A case report details a 29-year-old female with a history of psychiatric disorders who intentionally overdosed on acetylsalicylic acid.
The patient exhibited mixed acid-base disturbance (respiratory alkalosis and metabolic acidosis) and altered mental status.

Findings:

Initial treatment included bicarbonate infusion and slow, low-efficiency hemodialysis due to high salicylate levels (98.2).
A rebound increase in salicylate levels (129) occurred, leading to increased confusion and necessitating regular hemodialysis.
Regular hemodialysis improved mental status and steadily eliminated salicylate.

Implications:

Severe salicylate toxicity management is challenging, lacking a specific antidote.
Key therapeutic goals include limiting absorption, enhancing elimination, and providing supportive care.
Close monitoring of acid-base status, serum salicylate levels, and potential rebound toxicity is critical for successful outcomes.