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Related Concept Videos

Dosage Regimens: Designs and Approaches01:28

Dosage Regimens: Designs and Approaches

263
Designing a dosage regimen, which refers to the manner of drug administration, is a complex process involving the selection of drug dose, route, and frequency. This process is underpinned by pharmacokinetic parameters derived from tests and population averages. These parameters are then tailored to patient-specific variables such as diagnosis, demographics, and allergy status. Once therapy commences, therapeutic response monitoring is critical and achieved through clinical and physical...
263
Dosage Interval and Administration Route: Determination Methods01:19

Dosage Interval and Administration Route: Determination Methods

225
A medication’s effectiveness largely depends on its appropriate dosage and the route of administration. Dosage ensures that a sufficient drug concentration is maintained in the bloodstream to elicit the desired therapeutic effect without causing toxicity. The route of administration affects the drug's bioavailability, rate of absorption, and onset of action, which are crucial for achieving optimal therapeutic outcomes. Drug dosage calculations are critical to tailoring therapy to...
225
Dosage Regimens: Partial Pharmacokinetic Parameters01:01

Dosage Regimens: Partial Pharmacokinetic Parameters

154
It is not uncommon for complete drug pharmacokinetic profiles to remain elusive in pharmacokinetics. This necessitates certain educated assumptions by pharmacokineticists to determine appropriate dosage regimens without comprehensive pharmacokinetic data from animal or human studies. One prevalent assumption is setting the bioavailability factor, denoted as F, to 1 or 100%. This assumption caters to the scenario where a drug doesn't achieve full systemic absorption, resulting in the patient...
154
Dose Size and Dosing Frequency: Determination Methods01:21

Dose Size and Dosing Frequency: Determination Methods

278
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...
278
Dosage Regimen: Individualization01:24

Dosage Regimen: Individualization

166
Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
166
Estimation of k and VD of Aminoglycosides01:20

Estimation of k and VD of Aminoglycosides

214
Aminoglycosides are a class of antibiotics used to treat various bacterial infections. Clinicians must determine the elimination rate constant (k) and volume of distribution (VD) to optimize therapeutic efficacy and minimize toxicity. The k value represents the rate at which the drug is removed from the body, and the VD reflects the degree to which the drug distributes into body tissues. Accurately estimating these parameters allows healthcare professionals to tailor drug dosing to individual...
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Related Experiment Video

Updated: Jan 16, 2026

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
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A General Analytic Approach to Predicting the Best Antibiotic Dosing Regimen.

Leah Childers1, Pia Abel Zur Wiesch2, Jessica M Conway1

  • 1Department of Mathematics, Pennsylvania State University, University Park PA, U.S.A.

Biorxiv : the Preprint Server for Biology
|September 26, 2025
PubMed
Summary

Optimal antibiotic dosing depends on the dose-response curve

Keywords:
antibiotic dosingantimicrobial resistance (AMR)dose-response curvesmathematical modelingpharmacokinetics and pharmacodynamics (PK/PD)

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Area of Science:

  • Pharmacology
  • Mathematical Biology
  • Infectious Diseases

Background:

  • Optimal antibiotic dosing strategies remain unclear, with varying clinical practices.
  • Some antibiotics are best administered in continuous low doses, others require pulsed high doses.
  • The ideal approach for specific antibiotic-bacterial infection combinations is not well-defined.

Purpose of the Study:

  • To analyze bacterial population dynamics under constant concentration versus repeated dosing strategies.
  • To determine the key factors influencing optimal antibiotic dosing regimens.
  • To challenge the 'hit hard and hit early' paradigm.

Main Methods:

  • Utilized mathematical modeling to simulate bacterial populations.
  • Analyzed two dosing strategies: constant concentration and repeated dosing.
  • Incorporated fixed pharmacokinetic and pharmacodynamic properties into the models.

Main Results:

  • The shape of the antibiotic dose-response curve is critical in determining optimal dosing.
  • Curve concavity dictates whether constant or repeated dosing is superior.
  • Multiple concavities necessitate consideration of dosing range and tolerability.

Conclusions:

  • Antibiotic dosing optimization is complex and depends on dose-response curve characteristics.
  • The universal 'hit hard and hit early' approach may not always be optimal.
  • Findings support rational antibiotic prescription to minimize use and combat resistance.