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  • Title: Some pharmacokinetic and pharmacodynamic interactions between digoxin and gentamicin.
    Author: Staneva-Stoytcheva D, Kristeva E, Prodanova K.
    Journal: Eur J Drug Metab Pharmacokinet; 1992; 17(1):1-8. PubMed ID: 1323465.
    Abstract:
    Some pharmacokinetic and pharmacodynamic interactions between digoxin and gentamicin were studied in experiments on rabbits, guinea-pigs and cats. An increase of digoxin serum levels and changes in some basic pharmacokinetic parameters of digoxin (t1/2 alpha t1/2 beta, AUC, C1) were found in gentamicin-pretreated rabbits, the changes being dependent on the dose and schedule of administration. The most pronounced changes were those in digoxin kinetics during simultaneous 5-day treatment with digoxin (0.035 mg/kg i.v.) and nontoxic (10 and 2 mg/kg) doses of gentamicin. The toxicity of digoxin in guinea-pigs, assessed by administration of lethal doses of digoxin, was increased only after the highest dose of gentamicin (100 mg/kg), while after nontoxic or close to therapeutic doses (10 and 2 mg/kg) of gentamicin, the digoxin toxicity was either unchanged or even decreased. Digoxin decreased the nerve-muscle blocking effect of gentamicin on cat ischiadicus-gastrocnemius preparation. The possible mechanisms involved are discussed.
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