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Drug toxicity: Idiosyncratic Reactions

Drug toxicity: Idiosyncratic Reactions

Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...

Pharmacovigilance

Pharmacovigilance

Post-marketing surveillance is a critical component of pharmaceutical regulation, often uncovering unanticipated adverse drug reactions (ADRs) once a drug is widely used over an extended period.
This process, termed pharmacovigilance, aims to detect, evaluate, and minimize harmful effects related to medication use. The data collection for pharmacovigilance depends on spontaneous reporting systems, where healthcare professionals or patients voluntarily report suspected ADRs.
In some cases, there...

Drug Toxicity: Risk factors

Drug Toxicity: Risk factors

Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...

Allergic Drug Reactions

Allergic Drug Reactions

Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing numerous...

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...

Drug Toxicity: Dose-Dependent Reactions

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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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Related Experiment Video

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Tracking Drug-induced Changes in Receptor Post-internalization Trafficking by Colocalizational Analysis

Tracking Drug-induced Changes in Receptor Post-internalization Trafficking by Colocalizational Analysis

Published on: July 3, 2015

Drug reactions - new observations.

Ingrid H Wolf¹, Peter Wolf, Lorenzo Cerroni

¹Department of Dermatology and Venerology, Medical University of Graz, Austria. ingrid.wolf@meduni-graz.at

Journal Der Deutschen Dermatologischen Gesellschaft = Journal of the German Society of Dermatology : JDDG

|May 23, 2008

Summary

Two novel drug reactions in dermatology are presented: follicular eruption linked to Everolimus and sebaceous gland atrophy associated with Sirolimus. These findings highlight potential side effects of innovative immunosuppressants.

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Area of Science:

Dermatology
Pharmacology
Oncology

Background:

Innovative drugs, particularly immunosuppressants like mTOR inhibitors, are increasingly used in various medical fields.
Understanding the dermatological side effects of these novel therapeutics is crucial for patient management and treatment adherence.

Observation:

Two distinct clinical observations regarding drug-induced skin reactions are detailed.
Case 1: A patient developed a follicular eruption following treatment with Everolimus.
Case 2: Another patient exhibited atrophy of the sebaceous glands subsequent to Sirolimus therapy.

Findings:

Everolimus, an mTOR inhibitor, can induce a follicular drug eruption, a previously underreported reaction.
Sirolimus, another mTOR inhibitor, is associated with the development of sebaceous gland atrophy.
These findings underscore the varied and specific dermatological toxicities associated with mTOR inhibitors.

Implications:

Clinicians should be vigilant for follicular eruptions in patients treated with Everolimus.
The potential for Sirolimus to cause sebaceous gland atrophy warrants consideration in long-term treatment plans.
Further research into the mechanisms and management of these drug reactions is recommended to improve patient outcomes.