Tricyclic antidepressant overdose

Area of Science:

• Emergency Medicine
• Clinical Toxicology
• Cardiology

Background:

• Tricyclic antidepressant (TCA) overdose is a significant cause of morbidity and mortality.
• Cardiac dysrhythmias are a primary concern in TCA toxicity.
• Optimal management strategies, including monitoring duration and pharmacotherapy, require ongoing evaluation.

Purpose of the Study:

• To review recent literature on tricyclic antidepressant (TCA) overdose.
• To analyze cases of TCA overdose treated at the Ottawa Civic Hospital over one year.
• To provide recommendations on cardiac monitoring duration and the use of sodium bicarbonate for dysrhythmias.

Main Methods:

• Retrospective review of 33 cases of tricyclic or tricyclic plus other drug ingestion.
• Analysis of treatment methods, focusing on repeated charcoal dosing.
• Discussion of cardiac arrhythmias, TCA pharmacology, and monitoring duration.

Main Results:

• TCA overdose necessitates careful consideration of prolonged cardiac monitoring.
• Intravenous sodium bicarbonate is highlighted as a key treatment for TCA-induced dysrhythmias.
• Repeated charcoal dosing is discussed as a potential treatment modality.

Conclusions:

• Prolonged cardiac monitoring is crucial in tricyclic antidepressant (TCA) overdose management.
• Intravenous sodium bicarbonate should be considered the drug of choice for treating associated arrhythmias.
• Evidence supports specific recommendations for the duration of cardiac monitoring in TCA overdose cases.