Related Experiment Video
Updated: Jan 10, 2026

Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement
Published on: June 25, 2016
Loperamide-Induced Ventricular Arrhythmia and Seizures
Azalfa Lateef1, Ufuk Vardar2, Drew Sanclemente3
1Department of Internal Medicine, Mayo Clinic Florida, Jacksonville, Florida, USA.
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.
Area of Science:
- Cardiology
- Clinical Toxicology
- Pharmacology
Background:
- Loperamide is an over-the-counter medication commonly used for diarrhea.
- High doses of loperamide can lead to significant toxicity.
- Opioid withdrawal is a potential reason for high-dose loperamide misuse.
Related Concept Videos
Drugs Affecting GI Tract Motility: Opioids as Antidiarrheal Agents
Opioids, widely used antidiarrheal agents, mitigate diarrhea by slowing down...
Antiepileptic Drugs: Potassium Channel Activators
Ezogabine has gained approval as an adjunctive treatment...
Drugs for Treatment of Constipation-Predominant IBS
Antiepileptic Drugs: Sodium Channel Blockers
Sodium channel blockers modulate ion channels, particularly voltage-gated sodium channels. They block only sodium ion movement.
Among the most commonly prescribed antiepileptic drugs are...
Drugs for Treatment of Diarrhea-Predominant IBS
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...
Drugs Affecting GI Tract Motility: Dopamine Receptor Antagonists

