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Related Concept Videos

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Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
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A rational dosage regimen considers a drug's pharmacokinetics, including its absorption, distribution, metabolism, and elimination from the body. By understanding these factors, the appropriate dosage can be determined, and the dosing schedule can be designed to achieve and maintain the desired therapeutic effect while minimizing adverse effects.
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A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
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Fixed-dose regimens are a common approach to administer drugs to achieve and maintain desired levels of the drug in the body. In this dosing strategy, a specific amount of medication is given at regular intervals, often multiple times a day, to ensure a consistent drug concentration in the bloodstream.
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In patients with renal disease, dosage adjustments are necessary to maintain therapeutic plasma drug concentrations and prevent toxicity or subtherapeutic exposure. Renal impairment alters drug pharmacokinetics, especially in conditions like uremia, where changes such as prolonged elimination half-life and altered apparent volume of distribution can significantly affect drug disposition. These changes require careful modification of the dosing regimen to achieve the desired clinical...
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Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
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Updated: Dec 2, 2025

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Effective dose in medicine.

C J Martin1

  • 1Department of Clinical Physics and Bioengineering, University of Glasgow, Gartnavel Royal Hospital, Glasgow G12 0XH, UK.

Annals of the ICRP
|November 5, 2020
PubMed
Summary
This summary is machine-generated.

The International Commission on Radiological Protection developed effective dose (ED) to assess radiation risk in medical procedures. While valuable for guidelines and research, ED serves as an approximate risk measure, with its limitations and applications discussed.

Keywords:
Effective dosePatient doseRisk calculation

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Area of Science:

  • Medical Physics
  • Radiological Protection
  • Health Risk Assessment

Background:

  • The International Commission on Radiological Protection (ICRP) established effective dose (ED) for occupational and public radiation exposure.
  • A comparable dose quantity was needed for risk-based decisions in medical procedures.

Purpose of the Study:

  • To discuss the application and limitations of effective dose (ED) in medical imaging and nuclear medicine.
  • To provide guidance on the suitable uses of ED as an approximate measure of risk.

Main Methods:

  • Review of historical development of effective dose coefficients for medical procedures (1980s-1990s).
  • Analysis of the application of ED in establishing guidelines, selecting techniques, and research involving volunteers.
  • Discussion of approximations and uncertainties in ED calculations and risk assessment.

Main Results:

  • Effective dose (ED) is a crucial tool for patient referral, procedure justification, and imaging technique selection.
  • ED aids in providing dose data for research volunteers, balancing procedure benefits against risks.
  • The ICRP has prepared a report detailing the application of ED, confirming its role as an approximate risk indicator.

Conclusions:

  • Effective dose (ED) is a valuable, albeit approximate, measure of potential risk in medical exposures.
  • Understanding the approximations and uncertainties in ED is essential for its appropriate application.
  • Guidance is provided on suitable applications of ED and methods for risk communication.