Related Experiment Video

Updated: Aug 18, 2026

Fecal Glucocorticoid Analysis: Non-invasive Adrenal Monitoring in Equids
08:02

Fecal Glucocorticoid Analysis: Non-invasive Adrenal Monitoring in Equids

Published on: April 25, 2016

Pharmacokinetics and metabolism of budesonide, a selective glucocorticoid

A Ryrfeldt, P Andersson, S Edsbäcker

    European Journal of Respiratory Diseases. Supplement
    |January 1, 1982
    PubMed

    More Related Videos

    Determining Glucose Metabolism Kinetics Using 18F-FDG Micro-PET/CT07:07

    Determining Glucose Metabolism Kinetics Using 18F-FDG Micro-PET/CT

    Published on: May 2, 2017

    Mass Spectrometry and Luminogenic-based Approaches to Characterize Phase I Metabolic Competency of In Vitro Cell Cultures10:44

    Mass Spectrometry and Luminogenic-based Approaches to Characterize Phase I Metabolic Competency of In Vitro Cell Cultures

    Published on: March 28, 2017

    Related Concept Videos

    Drug Biotransformation: Overview01:16

    Drug Biotransformation: Overview

    Pharmaceutical substances known as xenobiotics are predominantly lipophilic and nonionized. This enables them to permeate lipid bilayers, such as cell membranes, and interact with intracellular target receptors. Lipophilic drugs have an advantage in crossing biological barriers and reaching their intended sites of action. However, lipophilic drugs often have a restricted capacity for renal expulsion or elimination from the body. When these drugs enter the kidneys and undergo glomerular...
    Drug Biotransformation: Overview01:28

    Drug Biotransformation: Overview

    Biotransformation, also known as drug metabolism, is a vital physiological process that chemically alters drugs, facilitating their elimination from the body and terminating their action. This process involves two main phases: phase I and phase II reactions. Phase I reactions, including oxidation, reduction, and hydrolysis, introduce or unmask polar functional groups on the drug molecule, thereby increasing its water solubility. By enhancing water solubility, the drug becomes more hydrophilic...
    Factors Affecting Drug Biotransformation: Physicochemical and Chemical Properties of Drugs01:21

    Factors Affecting Drug Biotransformation: Physicochemical and Chemical Properties of Drugs

    A drug's physicochemical properties fundamentally influence its metabolism. For instance, a drug's molecular size and shape critically determine its interaction with enzymes and transporters — larger drugs may face difficulty reaching enzyme active sites, altering their metabolic pathways. The pKa of a drug, which establishes its ionization state, can impact its solubility and absorption, thereby influencing metabolism.
    The drug's acidity or basicity is essential in determining the metabolic...
    Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance01:23

    Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance

    The elimination half-life and drug clearance of drugs following nonlinear kinetics can vary with dosage. The Michaelis-Menten parameters and drug concentration influence these factors. As the dose increases, the elimination half-life tends to lengthen, resulting in a reduction in clearance and a disproportionately larger area under the curve. The total clearance can be derived from the Michaelis-Menten equation for drugs following a one-compartment model.
    A study on guinea pigs examined the...
    Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

    Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion

    Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
    Pharmacokinetics in Pediatric Patients: Drug Metabolism01:24

    Pharmacokinetics in Pediatric Patients: Drug Metabolism

    In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses a challenge in...