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Related Experiment Videos

Pharmacokinetics of digoxin

J E Doherty, G V Dalrymple, M L Murphy

    Federation Proceedings
    |August 1, 1977
    PubMed
    Summary

    Digoxin, a common heart medication, has a long serum turnover time unaffected by administration route. Renal function significantly impacts its excretion, and serum levels aid in assessing toxicity and efficacy.

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    Area of Science:

    • Pharmacology
    • Clinical Pharmacy
    • Cardiology

    Background:

    • Digoxin is a widely prescribed digitalis glycoside for cardiac conditions.
    • Understanding digoxin's pharmacokinetics is crucial for safe and effective therapeutic use.

    Purpose of the Study:

    • To review the pharmacokinetics of digoxin.
    • To highlight factors affecting digoxin's disposition and clinical utility.

    Main Methods:

    • Review of existing pharmacokinetic data for digoxin.
    • Analysis of factors influencing serum levels and excretion.

    Main Results:

    • Digoxin exhibits a serum turnover time of approximately 34 hours, independent of administration route.
    • Renal excretion of unchanged digoxin is the primary elimination pathway, significantly impaired in renal failure.
    • Serum digoxin levels, measured by radioimmunoassay, are clinically valuable for toxicity and efficacy assessment, despite overlapping ranges.

    Conclusions:

    • Digoxin's pharmacokinetics are characterized by slow turnover and primary renal excretion.
    • Renal function is a critical determinant of digoxin levels and requires careful monitoring.
    • Specific patient populations (myocardial infarction, pulmonary heart disease, thyroid disease) may present unique challenges in digoxin management.

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