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Related Experiment Videos

Morphine pharmacokinetics in renal failure.

M Chauvin, P Sandouk, J M Scherrmann

    Anesthesiology
    |March 1, 1987
    PubMed
    Summary

    Chronic renal failure (RF) alters morphine pharmacokinetics, reducing its central compartment and volume of distribution. Morphine metabolites accumulate in patients with RF, indicating impaired clearance.

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    Area of Science:

    • Pharmacology
    • Nephrology
    • Clinical Pharmacy

    Background:

    • Chronic renal failure (RF) significantly impacts drug pharmacokinetics.
    • Morphine, a widely used analgesic, undergoes metabolism and excretion that may be affected by renal function.

    Purpose of the Study:

    • To investigate the pharmacokinetic profile of morphine in patients with end-stage chronic renal failure (RF).
    • To compare morphine pharmacokinetics between patients with RF and healthy controls.

    Main Methods:

    • Nine patients with end-stage RF and seven control patients received a 0.2 mg/kg intravenous bolus of morphine.
    • Plasma morphine concentrations were measured over 36 hours using radioimmunoassay.
    • Pharmacokinetic parameters including central compartment volume and volume of distribution were calculated.

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    Main Results:

    • Patients with RF exhibited a smaller central compartment volume and reduced volume of distribution compared to controls.
    • Plasma concentrations of morphine metabolites remained elevated for up to 36 hours in RF patients, unlike controls.
    • Elimination half-life and plasma clearance of morphine were similar between groups.

    Conclusions:

    • End-stage renal failure significantly alters morphine distribution, leading to reduced central compartment and volume of distribution.
    • Impaired clearance of morphine metabolites in RF patients suggests a prolonged effect and potential for accumulation.
    • These findings highlight the importance of considering renal function in morphine dosing to avoid adverse effects.