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Pharmacokinetics in Pediatric Patients: Drug Excretion01:26

Pharmacokinetics in Pediatric Patients: Drug Excretion

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In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
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Pediatric patient dosages diverge from adults due to disparities in body surface area, total body water, and extracellular fluid per kilogram of body weight. The dosing regimen considers the variations in pharmacokinetics and pharmacology across distinct age groups, encompassing preterm newborns, infants, young children, older children, and adolescents. Calculation of pediatric patient doses is predicated on determining body surface area, which exhibits a superior correlation with the child's...
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Gentamicin, an aminoglycoside antibiotic, is commonly administered via intermittent intravenous infusion to treat severe infections. An intermittent one-hour infusion of gentamicin, administered at eight-hour intervals, allows for precise control of plasma drug concentrations, minimizing toxicity while ensuring therapeutic efficacy. Pharmacokinetic principles govern the dynamics of plasma concentrations and can be mathematically described using specific equations.The plasma drug concentration...
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Therapeutic Drug Monitoring: Drug Analysis Methods01:26

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Therapeutic Drug Monitoring (TDM) is a clinical practice that measures specific drug levels in a patient's blood or body tissues to tailor drug therapy effectively. This monitoring is critical for managing drugs with narrow therapeutic indices like digoxin and phenytoin, ensuring they are both safe and effective. For instance, monitoring theophylline levels in asthma patients involves precision and sensitivity to adjust doses according to individual responses to therapy, ensuring efficacy and...
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Therapeutic Drug Monitoring: Overview and Classification01:16

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Therapeutic Drug Monitoring (TDM) is a clinical practice that measures specific drug levels in a patient's blood at designated intervals to ensure the drug concentration stays within a therapeutic range. This monitoring is crucial for optimizing individual dosage regimens, enhancing therapeutic efficacy, and minimizing drug-related toxicity. TDM is vital for drugs with narrow therapeutic windows, significant variability in pharmacokinetics, and a clear correlation between plasma levels and...
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Dosage Interval and Administration Route: Determination Methods01:19

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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...
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Antimicrobial Use Monitoring in Neonatal Population Using a Defined Daily Doses Method.

Paloma Suárez-Casillas1, Marta Mejías-Trueba2,3,4,5, Germán Peñalva6,7,8

  • 1Department of Pharmacy, Hospital Universitario Virgen del Rocío, Seville, Spain.

Neonatology
|November 3, 2025
PubMed
Summary

Defined daily doses for neonates (DDDn) are a feasible metric for monitoring neonatal antimicrobial consumption. This approach enhances antimicrobial stewardship programs (ASPs) and optimizes antibiotic use in neonates.

Keywords:
Antimicrobial stewardship programsAntimicrobial useDefined daily dosesNeonatal population

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Area of Science:

  • Neonatal pharmacology
  • Antimicrobial stewardship
  • Public health

Background:

  • Neonatal populations require standardized metrics for antimicrobial consumption monitoring.
  • Existing antimicrobial stewardship programs (ASPs) can be enhanced by improved data on antibiotic usage.
  • Defined daily doses for neonates (DDDn) offer a potential solution for standardized measurement.

Purpose of the Study:

  • To assess the feasibility of using defined daily doses for neonates (DDDn) as a standardized metric.
  • To establish new DDDn values for antimicrobials lacking them.
  • To improve antimicrobial stewardship in neonatal care.

Main Methods:

  • Observational study in a tertiary-care teaching hospital's Neonatology Unit (January 2016-December 2023).
  • Prospective data collection on antimicrobial use.
  • Utilized previously validated and newly established DDDn values; consumption measured as DDDn per 1,000 occupied bed days (OBDs).

Main Results:

  • Validated DDDn for 10 antimicrobials, including piperacillin-tazobactam, cefepime, and amoxicillin-clavulanic acid.
  • Mean global antimicrobial consumption: 5.271 ± 1.435 DDDn/1,000 OBDs/year.
  • Established conversion factors for oral and intravenous antimicrobials.

Conclusions:

  • DDDn is a feasible tool for monitoring neonatal antimicrobial consumption.
  • Standardized DDDn metrics can enhance ASPs and optimize antibiotic use.
  • Further research is needed to validate DDDn across diverse antimicrobials and settings.