Loperamide-Induced Ventricular Arrhythmia and Seizures

Azalfa Lateef1, Ufuk Vardar2, Drew Sanclemente3

  • 1Department of Internal Medicine, Mayo Clinic Florida, Jacksonville, Florida, USA.

JACC. Case Reports
|November 28, 2025
PubMed
Summary

High doses of loperamide, an over-the-counter medication, can cause severe cardiotoxicity, including acquired long QT syndrome and ventricular arrhythmias. This case highlights the potential for life-threatening cardiac and neurologic events with excessive loperamide use.

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