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March 21, 2026Journal of Community Hospital Internal Medicine PerspectivesOpen Access

Relying on the outdated Cockcroft-Gault formula instead of eGFR risks significant medication dosing errors.

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Why the study?

Despite advances in medicine, Cockcroft-Gault remains the standard for medication dosing, creating tension with guidelines suggesting eGFR.

Comparison

Guidelines suggesting eGFR vs continued reliance on the Cockcroft-Gault formula for medication dosing

Key result

Despite modern guidelines recommending eGFR for medication dosing, the outdated Cockcroft-Gault formula remains widely used in clinical practice, potentially leading to significant dosing errors.

Authors

WDWitt DurdenAAAmna AneesJTJoel Michels Topf

Discussion

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Overview

Clinicians should adopt eGFR for dosing to prevent harm; challenges persistent reliance on Cockcroft-Gault despite guidelines.

Key Points

  • To investigate the ongoing use of outdated creatinine formulas for medication dosing despite advances in medical science.
  • Reviewed historical context of creatinine clearance formulas
  • Analyzed current clinical guidelines on medication dosing
  • Discussed discrepancies between recommended practices and real-world applications
  • Continued reliance on Cockcroft-Gault formula despite advancements
  • Guidelines advocate for eGFR, but practice lags behind
  • Identified significant knowledge gaps in nephrology

Structured PICO

P
Population
Patients requiring renal dose adjustments for medications, illustrated by a 62-year-old paraplegic male with Type 2 diabetes and suspected sepsis.
I
Intervention
Medication dosing based on modern eGFR equations (CKD-EPI) or measured GFR.
C
Comparator
Medication dosing based on the Cockcroft-Gault creatinine clearance formula.

This perspective highlights the clinical dilemma and potential for patient harm when relying on the outdated Cockcroft-Gault formula for medication dosing instead of modern eGFR equations.

Limitations

  • Most pharmacokinetic studies used Cockcroft-Gault as the standard
  • Few studies validate using eGFR for medication dosing
  • Cystatin C is not available in all clinical settings

Cite This Study

Durden et al. (2026) conducted a review in Chronic Kidney Disease. eGFR equations vs. Cockcroft-Gault formula was evaluated. Despite modern guidelines recommending eGFR for medication dosing, the outdated Cockcroft-Gault formula remains widely used in clinical practice, potentially leading to significant dosing errors.

synapsesocial.com/papers/69be38906e48c4981c679127https://doi.org/10.55729/2000-9666.1592
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Glomerular Filtration Rate Equations Overestimate Creatinine Clearance in Older Individuals Enrolled in the Baltimore Longitudinal Study on Aging: Impact on Renal Drug Dosing2013 · 152 citations
  2. 2The Clinician and Estimation of Glomerular Filtration Rate by Creatinine-based Formulas2011 · 102 citations
  3. 3Formula-Based Estimates of the GFR: Equations Variable and Uncertain2008 · 91 citations
  4. 4Drugs Dosing in Geriatric Patients Depending on Kidney Function Estimated by MDRD and Cockroft-Gault Formulas2021 · 5 citations
  5. 5Predictive Performance of the Modification of Diet in Renal Disease and Cockcroft-Gault Equations for Estimating Renal Function2005 · 804 citations