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[Interaction of amiodarone and digoxin]
Schweizerische Medizinische Wochenschrift
|November 19, 1983
Summary
Amiodarone significantly increases digoxin levels in patients with supraventricular tachyarrhythmia. Monitoring plasma digoxin levels is crucial during the initial weeks of combined amiodarone and digoxin therapy.
Area of Science:
- Clinical Pharmacology
- Cardiology
Context:
- Supraventricular tachyarrhythmia treatment often requires multiple medications.
- Digoxin monotherapy may be insufficient for certain patients.
Purpose:
- To investigate the potential interaction between amiodarone and digoxin.
- To quantify the effect of amiodarone on plasma digoxin levels.
Summary:
- This clinical study involved 13 patients with supraventricular tachyarrhythmia receiving digoxin, to whom amiodarone was added.
- Plasma digoxin levels were monitored before and after amiodarone initiation.
- A significant increase in plasma digoxin levels was observed in 11 patients within the first 2 weeks of combined therapy.
Impact:
- Demonstrates a clinically significant drug interaction between amiodarone and digoxin.
- Highlights the need for regular plasma digoxin level monitoring during the first 3 weeks of combined treatment.
- Suggests dose adjustments for digoxin to prevent potential toxicity.