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Related Experiment Videos

Methyldopa does not alter the disposition of digoxin.

C A May, P H Vlasses, M L Rocci

    Journal of Clinical Pharmacology
    |August 1, 1984
    PubMed
    Summary

    Methyldopa does not affect how the body processes digoxin, according to a study in healthy individuals. This suggests that methyldopa is unlikely to cause pharmacokinetic interactions with digoxin in patients.

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    Area of Science:

    • Pharmacology
    • Clinical Pharmacology
    • Drug Interactions

    Background:

    • Digoxin is a crucial medication for heart conditions.
    • Methyldopa is commonly prescribed for hypertension.
    • Potential drug interactions between methyldopa and digoxin require investigation.

    Purpose of the Study:

    • To determine if methyldopa alters the pharmacokinetic disposition of digoxin.
    • To assess the potential for a drug interaction between these two medications.

    Main Methods:

    • A double-blind, cross-over study involving eight healthy subjects.
    • Subjects received either methyldopa or placebo for 16 days.
    • Digoxin (intravenous and oral) was administered, and plasma and urine concentrations were measured.

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    Main Results:

    • No significant differences were observed in digoxin's area under the curve (AUC) or urinary excretion between methyldopa and placebo groups.
    • Mean steady-state serum concentrations of oral digoxin were comparable with and without methyldopa.
    • Statistical power analysis indicated the study could detect meaningful differences of approximately 30%.

    Conclusions:

    • Methyldopa does not significantly alter the disposition of digoxin in healthy subjects.
    • A clinically significant pharmacokinetic interaction between methyldopa and digoxin is unlikely in patients.