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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.
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Drug Toxicity: Dose-Dependent Reactions01:24

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Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
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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.
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Disorders of the Nervous Tissue01:28

Disorders of the Nervous Tissue

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Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
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Toxidromes: Clinical Features01:30

Toxidromes: Clinical Features

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Toxidromes are specific patterns of symptoms resulting from toxic substance exposure. They help in the identification and treatment of poisoning. The symptoms of each toxidrome group indicate poisoning by a certain class of chemicals or drugs.1. Sympathomimetic: Stimulates the sympathetic nervous system. Symptoms include agitation, increased heart rate (HR), blood pressure (BP), respiratory rate (RR), temperature, and pupil size. Drugs like cocaine and amphetamines, along with tremors and...
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Drug Toxicity: Overview01:00

Drug Toxicity: Overview

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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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Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity
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Toxic Neuropathies.

Chafic Karam1, P James B Dyck2

  • 1Department of Neurology, The University of North Carolina at Chapel Hill, North Carolina.

Seminars in Neurology
|October 28, 2015
PubMed
Summary
This summary is machine-generated.

Toxic neuropathies, a significant cause of acquired polyneuropathy, are reviewed. This article systematically examines neuropathies from drugs, heavy metals, environmental agents, and alcohol.

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Area of Science:

  • Neurology
  • Toxicology

Background:

  • Toxic neuropathies represent a rare yet critical etiology of acquired polyneuropathy.
  • Understanding these conditions is vital for accurate diagnosis and management.

Purpose of the Study:

  • To provide a comprehensive review of toxic neuropathies.
  • To systematically analyze neuropathies associated with various toxins.

Main Methods:

  • Literature review of toxic neuropathies.
  • Systematic categorization of etiological agents.

Main Results:

  • Detailed discussion of general principles of toxic neuropathies.
  • Systematic review covering drug-induced, heavy metal-induced, environmental/industrial agent-induced, and alcoholic neuropathies.

Conclusions:

  • Toxic neuropathies encompass a diverse range of etiologies.
  • This review serves as a resource for understanding and identifying toxic polyneuropathies.