Tag: QT prolongation
Dofetilide and Cimetidine: Why This Drug Pair Can Trigger Life-Threatening Arrhythmias
Nov 19 2025 / MedicationsDofetilide and cimetidine together can cause life-threatening heart rhythms due to a dangerous drug interaction that spikes dofetilide levels. Learn why this combo is strictly contraindicated and what safer alternatives exist.
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