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Related Concept Videos

Drug Toxicity: Dose-Dependent Reactions01:24

Drug Toxicity: Dose-Dependent Reactions

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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Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
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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 Elimination by Renal Route: Tubular Reabsorption01:22

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During the process of renal excretion, as the glomerular filtrate progresses to the distal convoluted tubule (DCT), drugs that are highly permeable, lipophilic, and nonionized undergo passive reabsorption from the tubular fluid into the surrounding peritubular capillaries. This reabsorption process restricts their elimination through the kidneys. However, the majority of drugs are either weak acids or weak bases, and their ionization level is dependent on pH. By altering the pH of urine, the...
Drug toxicity: Idiosyncratic Reactions01:16

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...
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Drug toxicity: Drug–Drug Interaction

Drug–drug interactions can precipitate toxicity through multiple mechanisms. Absorption interactions alter how drugs enter the body, exemplified when ranitidine increases the absorption of basic drugs, while cholestyramine decreases the levels of propranolol. Protein binding interactions occur when drugs share the same binding sites on plasma proteins. Drugs like aspirin and warfarin, when bound in excess, can lead to increased free drug concentrations, enhancing the potential for...

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Non-drug-induced nephrotoxicity.

Justine Bacchetta1, Laurence Dubourg, Laurent Juillard

  • 1Centre de Référence des Maladies Rénales Rares, Service de Néphrologie et Rhumatologie Pédiatriques, Hôpital Femme Mère Enfant, Boulevard Pinel, 69677 Bron, France.

Pediatric Nephrology (Berlin, Germany)
|April 29, 2009
PubMed
Summary

Unconventional agents like environmental toxins, foods, and drugs can cause kidney damage (nephrotoxicity). Early recognition of unexplained renal impairment is crucial, particularly in children, to manage this condition effectively.

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Early Detection of Drug-Induced Renal Hemodynamic Dysfunction Using Sonographic Technology in Rats
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Area of Science:

  • Nephrology
  • Toxicology
  • Environmental Health

Background:

  • Various drugs and compounds are known to induce acute and/or chronic nephrotoxicity.
  • Nephrotoxicity is influenced by local environmental, dietary, and cultural factors.
  • The incidence and precise mechanisms of unconventional nephrotoxicity are not well understood.

Purpose of the Study:

  • To review the clinical features of nephrotoxicity induced by atypical or unconventional agents.
  • To highlight the diverse range of causative agents, including environmental, food, and drug-related substances.
  • To emphasize the importance of considering nephrotoxicity in cases of unexplained renal impairment.

Main Methods:

  • Literature review of clinical features associated with nephrotoxicity from unconventional sources.
  • Analysis of case studies and epidemiological data, including recent melamine-related epidemics.
  • Synthesis of information on pathophysiological pathways and renal lesion spectrum.

Main Results:

  • A wide spectrum of renal lesions and diverse pathophysiological pathways are involved in unconventional nephrotoxicity.
  • Epidemic nephrotoxicity can occur, as demonstrated by melamine-induced kidney injury in infants.
  • Clinical presentation varies based on local factors, food, and cultural practices.

Conclusions:

  • Nephrotoxicity from atypical agents is a significant concern with potentially widespread implications.
  • Unexplained renal impairment, especially in children, warrants thorough investigation for potential toxic causes.
  • Prompt recognition and expert analysis are vital for managing outbreaks and providing appropriate care.