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Related Concept Videos

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...
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess the...
Hepatic Encephalopathy01:29

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...
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...
Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment01:08

Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment

Hepatic impairment, characterized by decreased liver function, does not uniformly mandate adjustments in drug dosage. Whether dosage modifications are necessary depends on various factors related to the drug's metabolism and elimination pathways. If a drug is primarily excreted via the kidneys and bypasses significant hepatic processing, if it undergoes minimal metabolic transformation in the liver, or if it is volatile and primarily expelled through the lungs, dose adjustments may not be...
Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems01:19

Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems

Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...

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Employing Pressurized Hot Water Extraction (PHWE) to Explore Natural Products Chemistry in the Undergraduate Laboratory
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Hepatotoxicity of eugenol.

V Soundran1, T Namagiri, S Manonayaki

  • 1Department of Biochemistry, P.S.G. Institute of Medical Sciences & Research, Coimbatore - 641 004, India.

Ancient Science of Life
|May 5, 2012
PubMed
Summary

Eugenol, a common pharmaceutical, shows liver toxicity in rats. Studies indicate dose-dependent increases in liver enzymes and bilirubin levels, confirming its harmful effects.

Area of Science:

  • Pharmacology
  • Toxicology
  • Biochemistry

Background:

  • Eugenol is a widely utilized pharmaceutical compound.
  • Understanding its toxicological profile is crucial for safe application.

Purpose of the Study:

  • To investigate the potential liver toxicity of eugenol in a rat model.
  • To assess the impact of eugenol administration on specific liver enzymes and bilirubin levels.

Main Methods:

  • Male albino rats were administered two different doses of eugenol (20 & 30 μg/100g body weight/day) intramuscularly for 10 days.
  • Liver function was evaluated by measuring serum enzyme activities (alkaline phosphatase, transaminases, lactate dehydrogenase, glutamyl transferase) and total and differential bilirubin concentrations.

Main Results:

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  • A dose-dependent increase in total and differential bilirubin fractions was observed.
  • Activities of alkaline phosphatase, transaminases, and lactate dehydrogenase showed a dose-dependent increase.
  • A decrease in glutamyl transferase activity was noted, suggesting liver damage.

Conclusions:

  • Eugenol exhibits toxic effects on the liver in rats.
  • The observed changes in liver enzymes and bilirubin levels indicate impaired liver function following eugenol exposure.