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Sotalol kinetics in renal insufficiency

A D Blair, E D Burgess, B M Maxwell

    Clinical Pharmacology and Therapeutics
    |April 1, 1981
    PubMed
    Summary

    Sotalol clearance and half-life are significantly affected by renal function. Reduced kidney function prolongs sotalol

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    Area of Science:

    • Pharmacology
    • Nephrology
    • Clinical Pharmacy

    Background:

    • Sotalol is a beta-adrenergic receptor antagonist used for treating cardiac arrhythmias.
    • Renal function significantly influences the elimination of many renally excreted drugs.
    • Understanding sotalol pharmacokinetics in varying renal function is crucial for safe and effective dosing.

    Purpose of the Study:

    • To investigate the pharmacokinetic profile of sotalol in patients with different levels of renal function.
    • To determine the impact of impaired renal function and hemodialysis on sotalol elimination.

    Main Methods:

    • Sotalol plasma concentrations were measured in 20 patients with varying renal function.
    • Pharmacokinetic parameters including plasma clearance, elimination half-life, and renal clearance were calculated.
    • Creatinine clearance (Clcr) was used to stratify patients based on renal function.

    Main Results:

    • In patients with adequate renal function (Clcr >= 39 ml/min/m2), sotalol plasma clearance was 71 ml/min/m2 and half-life was 8.1 hours.
    • Moderate renal impairment (Clcr 8-38 ml/min/m2) led to a prolonged elimination half-life (24.2 hours) and reduced plasma clearance (24 ml/min/m2).
    • Patients on dialysis showed a significantly longer elimination half-life (33.9 hours), which was reduced to 5.8 hours during hemodialysis, with a 56.7% decrease in plasma levels.

    Conclusions:

    • Sotalol elimination is highly dependent on renal function.
    • Dosing adjustments are necessary for patients with impaired renal function to avoid drug accumulation and potential toxicity.
    • Hemodialysis effectively removes sotalol from circulation, suggesting its utility in managing overdose or toxicity in dialysis patients.

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