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Renal failure with potassium-sparing diuretics.

K L Lynn, R R Bailey, C P Swainson

    The New Zealand Medical Journal
    |August 14, 1985
    PubMed
    Summary
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    Potassium-sparing diuretics can cause renal failure in elderly patients with impaired kidney function. Stopping these diuretics and non-steroidal anti-inflammatory drugs (NSAID) often improves renal function.

    Area of Science:

    • Nephrology
    • Geriatrics
    • Pharmacology

    Background:

    • Elderly patients with renal impairment are susceptible to drug-induced kidney injury.
    • Potassium-sparing diuretics (e.g., amiloride, triamterene) are commonly prescribed for hypertension and fluid retention.
    • Non-steroidal anti-inflammatory drugs (NSAID) can also impact renal function.

    Purpose of the Study:

    • To investigate the role of potassium-sparing diuretics and NSAID in causing renal failure in elderly patients.
    • To assess the reversibility of renal impairment after drug withdrawal.

    Main Methods:

    • Retrospective analysis of 19 elderly patients presenting with renal failure.
    • Review of medication history, focusing on potassium-sparing diuretics and NSAID.
    • Monitoring of renal function and blood pressure after drug discontinuation.

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    Main Results:

    • 19 elderly patients (mean age 73) with renal failure were identified, many on potassium-sparing diuretics and/or NSAID.
    • Renal function improved in 17 patients (89%) after stopping these medications.
    • Blood pressure was controlled without medication in 11 patients, and two patients were edema-free.

    Conclusions:

    • Potassium-sparing diuretics can precipitate renal failure in elderly individuals with compromised kidney function.
    • Hypovolemia and concomitant NSAID use may potentiate this adverse effect.
    • Discontinuation of offending agents can lead to significant renal function recovery.