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Tackling the need to teach integrative pharmacology and physiology: problems and ways forward

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    Pharmacokinetic–Pharmacodynamic Relationship: Problems01:24

    Pharmacokinetic–Pharmacodynamic Relationship: Problems

    The empirical approach to drug therapy optimization relies on correlating pharmacological response with administered dosage. Such an approach can be costly, time-consuming, and often yields poor correlation due to variables like formulation factors and drug elimination characteristics. A more precise approach correlates response with plasma drug concentration or the amount of drug in the body, rather than dosage. This is achieved through pharmacokinetic-pharmacodynamic (PK/PD) modeling, which...
    Pharmacodynamics: Overview and Principles01:21

    Pharmacodynamics: Overview and Principles

    Pharmacodynamics is a scientific field that delves into drugs' intricate biochemical, cellular, and physiological effects on the human body. The study of pharmacodynamics helps us understand how drugs interact with the body and elicit various responses.
    Most drugs' effects result from their interactions with drug receptors or targets within the body. These interactions trigger specific responses at the cellular or systemic level. Drug receptors can be found on the surfaces of cells or within...
    Biopharmaceutics and Pharmacokinetics: Overview01:28

    Biopharmaceutics and Pharmacokinetics: Overview

    Understanding drugs, drug products, and their performance in pharmaceutical science is pivotal. Drugs, whether simple molecules or complex compounds, are designed to interact with the body's biological systems to diagnose, treat, or prevent diseases. Drug products include various delivery systems such as tablets, capsules, injections, and inhalers. The performance of these drug products is gauged by their ability to deliver the active ingredient to the desired site of action at the appropriate...
    Model Approaches for Pharmacokinetic Data: Physiological Models01:15

    Model Approaches for Pharmacokinetic Data: Physiological Models

    Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...
    Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance01:07

    Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance

    Drug transporters are critical in drug absorption, distribution, and excretion processes. They should be included in physiological-based pharmacokinetic (PBPK) models, which help predict human drug disposition. However, predicting this is challenging during drug development, especially when liver transport is involved. However, with a realistic representation of body transport processes, an accurate model may be possible.
    A recent model describes pravastatin's hepatobiliary excretion, mediated...
    Model Approaches for Pharmacokinetic Data: Compartment Models01:14

    Model Approaches for Pharmacokinetic Data: Compartment Models

    Compartmental analysis is a widely adopted approach to characterizing drug pharmacokinetics. It uses compartment models that conceptualize the body as a collection of reversibly communicating compartments, each representing a group of tissues exhibiting similar drug distribution characteristics. The movement rate of the drug between these compartments is typically described by first-order kinetics.
    Two primary types of compartment models are recognized: mammillary and catenary. The more...