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Related Experiment Videos

Digoxin-carvedilol interactions in children.

Savithiri Ratnapalan1, Kathryn Griffiths, Adriana Moldovan Costei

  • 1Division of Clinical Pharmacology/Toxicology, Department of Pediatrics, Hospital for Sick Children, Toronto, Ontario, Canada.

The Journal of Pediatrics
|May 21, 2003
PubMed
Summary

Carvedilol significantly reduces digoxin clearance in children with heart failure, increasing toxicity risk. Doses of digoxin may require reduction when coadministered with carvedilol to ensure patient safety.

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Area of Science:

  • Pediatric Cardiology
  • Clinical Pharmacology

Background:

  • Digoxin and carvedilol are frequently prescribed together for pediatric severe ventricular failure.
  • Understanding drug interactions is crucial for optimizing treatment and preventing adverse events in children.

Purpose of the Study:

  • To investigate the pharmacokinetic interaction between digoxin and carvedilol in pediatric patients.
  • To assess the impact of carvedilol on digoxin's oral clearance and the incidence of digoxin toxicity.

Main Methods:

  • A cohort of eight pediatric patients (2 weeks to 8 years) with severe ventricular failure was studied.
  • Oral clearance of digoxin was measured before and during coadministration with carvedilol.

Main Results:

  • Coadministration with carvedilol resulted in a 50% decrease in the oral clearance of digoxin.

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  • Two patients experienced digoxin toxicity, necessitating dose adjustments.

    • Conclusions:

    • Carvedilol significantly increases serum concentrations of digoxin in pediatric patients.
    • Reduced digoxin dosage is recommended when coadministered with carvedilol to mitigate the risk of toxicity.