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Related Experiment Videos

Furosemide kinetics in renal failure.

W J Tilstone, A Fine

    Clinical Pharmacology and Therapeutics
    |June 1, 1978
    PubMed
    Summary

    Furosemide (a diuretic) shows significantly altered pharmacokinetics in patients with renal failure compared to healthy individuals. This impacts its clearance, distribution, and absorption, necessitating careful dosing adjustments.

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    Area of Science:

    • Pharmacology
    • Nephrology
    • Clinical Pharmacokinetics

    Background:

    • Furosemide is a widely used loop diuretic.
    • Renal impairment significantly affects drug pharmacokinetics.
    • Understanding furosemide's behavior in renal failure is crucial for effective treatment.

    Purpose of the Study:

    • To investigate and compare the pharmacokinetic parameters of furosemide in healthy volunteers and patients with renal failure.
    • To assess the impact of renal impairment on furosemide's clearance, volume of distribution, half-life, and bioavailability.

    Main Methods:

    • Pharmacokinetic analysis of furosemide administered via intravenous bolus and infusion in normal subjects.
    • Comparison of pharmacokinetic parameters (clearance, volume of distribution, half-life, bioavailability) between normal subjects and patients with renal failure.
    • Oral bioavailability assessment of furosemide tablets in renal failure patients.

    Main Results:

    • Normal subjects exhibited a total body clearance of 1.53 ml/min/kg and an oral absorption of 68.9%.
    • Patients with renal failure showed significantly reduced clearance (0.27 ml/min/kg), prolonged half-life (14.2 hr), and decreased oral absorption (43.4%).
    • Oral bioavailability of furosemide tablets in renal failure patients was comparable to oral solution absorption.

    Conclusions:

    • Renal failure drastically alters furosemide pharmacokinetics, leading to reduced clearance and impaired absorption.
    • These findings highlight the need for individualized dosing strategies for furosemide in patients with impaired renal function.
    • Furosemide bioavailability is significantly diminished in renal failure, impacting therapeutic efficacy.

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