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Related Concept Videos

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...
Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow

Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug binding...
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...
Effect of Hepatic Disease on Pharmacokinetics: Active Drug, Metabolite and Fraction of Metabolized Drug01:14

Effect of Hepatic Disease on Pharmacokinetics: Active Drug, Metabolite and Fraction of Metabolized Drug

In pharmacotherapy, monitoring drug concentrations is paramount, especially for drugs whose therapeutic effects hinge on both the active compound and its metabolite. Hepatic impairment profoundly influences drug potency by altering liver function. If the drug is more potent than its metabolite, impaired liver function amplifies drug activity due to elevated drug concentration levels. Conversely, if the metabolite holds greater potency, diminished liver function diminishes drug activity by...
Renal Failure: Dose Adjustments01:11

Renal Failure: Dose Adjustments

In patients with renal impairment, drugs undergo significant changes in their pharmacokinetics, which require dosage adjustments to ensure safe and effective therapy.
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
Bioavailability: Influencing Factors01:22

Bioavailability: Influencing Factors

Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...

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Related Experiment Video

Updated: May 12, 2026

An Intestine/Liver Microphysiological System for Drug Pharmacokinetic and Toxicological Assessment
08:59

An Intestine/Liver Microphysiological System for Drug Pharmacokinetic and Toxicological Assessment

Published on: December 3, 2020

Prescribing in patients with abnormal liver function tests.

Emily Smith1, Paul Desmond

  • 1Department of Gastroenterology, St Vincent's Hospital, Melbourne, Victoria. emily.smith@svhm.org.au

Australian Family Physician
|March 27, 2013
PubMed
Summary
This summary is machine-generated.

Prescribing medications for patients with abnormal liver function tests (LFTs) requires careful evaluation. Dose adjustments may be necessary for certain drugs in patients with cirrhosis to ensure safe and effective treatment.

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Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
11:06

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro

Published on: January 31, 2022

Related Experiment Videos

Last Updated: May 12, 2026

An Intestine/Liver Microphysiological System for Drug Pharmacokinetic and Toxicological Assessment
08:59

An Intestine/Liver Microphysiological System for Drug Pharmacokinetic and Toxicological Assessment

Published on: December 3, 2020

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
11:06

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro

Published on: January 31, 2022

Area of Science:

  • Pharmacology
  • Hepatology
  • Clinical Pharmacy

Background:

  • Prescribing medications for patients with abnormal liver function tests (LFTs) necessitates careful consideration.
  • Determining the cause of abnormal LFTs and the presence of cirrhosis is crucial for safe prescribing.
  • Abnormal LFTs can indicate underlying liver conditions that may affect drug metabolism and excretion.

Purpose of the Study:

  • To review the use of potentially hepatotoxic drugs in patients with abnormal LFTs.
  • To provide guidance on dose modification for medications in patients with cirrhosis.
  • To highlight the implications of liver dysfunction on drug prescribing practices.

Main Methods:

  • Literature review of studies on drug prescribing in patients with abnormal liver function.
  • Analysis of factors influencing drug choice and dosage in liver disease.
  • Synthesis of current guidelines and evidence regarding medication use in cirrhosis.

Main Results:

  • Idiosyncratic drug reactions occur with similar frequency in patients with normal or abnormal liver function.
  • Drugs primarily metabolized or excreted by the liver, especially those with a narrow therapeutic index, require cautious use in advanced liver disease.
  • Prescribing practices often need modification in patients with decompensated cirrhosis.

Conclusions:

  • Careful patient assessment is vital when prescribing for individuals with abnormal LFTs.
  • Dose adjustments and cautious drug selection are essential in patients with advanced liver disease and cirrhosis.
  • Understanding the impact of liver function on drug pharmacokinetics is critical for optimizing patient outcomes.