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Related Experiment Videos

Roxithromycin-induced digoxin toxicity

C E Corallo1, I R Rogers

  • 1Pharmacy Department, Box Hill Hospital, VIC.

The Medical Journal of Australia
|October 21, 1996
PubMed
Summary
This summary is machine-generated.

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Antibiotics like roxithromycin can cause digoxin toxicity in some patients. This occurs because antibiotics alter gut bacteria, which normally break down digoxin.

Area of Science:

  • Pharmacology
  • Microbiology
  • Internal Medicine

Background:

  • Digoxin is a cardiac glycoside used to treat heart failure and arrhythmias.
  • Gastrointestinal bacteria play a significant role in the metabolism of digoxin in 10%-15% of individuals.
  • Disruption of gut microbiota by antibiotics can alter drug metabolism.

Observation:

  • A 76-year-old female patient developed digoxin toxicity shortly after initiating a course of roxithromycin.
  • The patient's presentation suggests a potential drug interaction between roxithromycin and digoxin.

Findings:

  • Roxithromycin, a macrolide antibiotic, can modify the gut microbiome composition.
  • Altered gut flora due to roxithromycin may reduce the extensive bacterial degradation of digoxin.

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  • This reduction in digoxin metabolism can lead to increased bioavailability and potential toxicity.

    • Implications:

    • Clinicians should be aware of the potential for antibiotic-induced digoxin toxicity.
    • Monitoring digoxin levels may be warranted in patients receiving concurrent antibiotics, particularly those affecting gut flora.
    • This interaction highlights the importance of considering the microbiome's role in drug efficacy and safety.