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Related Concept Videos

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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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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Local Anesthetics: Adverse Effects01:12

Local Anesthetics: Adverse Effects

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While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
Once absorbed into the systemic circulation, local anesthetics can affect the organs that depend on the functioning of sodium...
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Antidotes01:17

Antidotes

741
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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Neurochemical Transmission: Sites of Drug Action01:26

Neurochemical Transmission: Sites of Drug Action

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Neurochemical transmission, the conduction of electrical impulses between neurons mediated by neurotransmitters, plays a vital role in various physiological processes. Autonomic drugs exert their effects by modulating neurotransmission within the autonomic nervous system. For instance, drugs such as hemicholinium block the precursor uptake necessary for synthesizing acetylcholine, an essential autonomic neurotransmitter. Following synthesis, neurotransmitters are stored in vesicles. Metyrosine...
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Drugs Affecting Neurotransmitter Synthesis01:29

Drugs Affecting Neurotransmitter Synthesis

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Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase,...
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Updated: Aug 27, 2025

Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity
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Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity

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Update on Toxic Neuropathies.

Jannik Peters1, Nathan P Staff1

  • 1Department of Neurology, Mayo Clinic Rochester, MN USA.

Current Treatment Options in Neurology
|October 3, 2022
PubMed
Summary
This summary is machine-generated.

Toxic neuropathies are common, treatable peripheral nerve disorders. Prevention and symptom management are key, as new treatments are lacking, emphasizing detailed exposure histories for diagnosis.

Keywords:
Toxic neuropathyalcohol-induced neuropathychemotherapy-induced peripheral neuropathyneurotoxins

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Area of Science:

  • Neurology
  • Toxicology

Background:

  • Toxic neuropathies represent a significant global health burden, often preventable and treatable.
  • Diverse causative agents include alcohol, industrial chemicals, biotoxins, and medications, with no new breakthrough treatments identified.

Purpose of the Study:

  • To provide an updated review of toxic neuropathies, focusing on causes, clinical presentations, and current management strategies.
  • To increase awareness and vigilance regarding these neurological conditions.

Main Methods:

  • A comprehensive literature review was conducted to synthesize recent findings on toxic neuropathies.
  • Information was gathered on etiological agents, clinical manifestations, and therapeutic options.

Main Results:

  • Toxic neuropathies remain a prevalent cause of morbidity worldwide, with numerous contributing factors.
  • Effective management relies on prevention and symptomatic relief, as novel treatments are not yet available.

Conclusions:

  • Identifying toxic neuropathies requires thorough patient histories, including medication, occupational, and hobby-related exposures.
  • Further research into neurotoxic susceptibility mechanisms and common pathomechanisms is crucial for developing broader treatment strategies.