Clinical effects of accidental levothyroxine ingestion in children

Area of Science:

• Pediatric Endocrinology
• Clinical Toxicology

Background:

• Levothyroxine sodium is a common thyroid hormone replacement medication.
• Accidental ingestion can occur in young children, necessitating an understanding of potential toxic effects.

Purpose of the Study:

• To evaluate the clinical manifestations and outcomes following accidental levothyroxine sodium ingestion in children aged 1 to 5 years.
• To determine the correlation between ingested dosage, serum thyroxine levels, and observed symptoms.

Main Methods:

• Retrospective study of 41 children (aged 1-5 years) with accidental levothyroxine sodium ingestion.
• Clinical assessment of symptoms, including tachycardia, behavioral changes, and gastrointestinal disturbances.
• Correlation analysis of symptoms with estimated hormone intake and serum thyroxine levels.

Main Results:

• Eleven out of 41 children (27%) exhibited symptoms possibly related to levothyroxine ingestion.
• Observed symptoms such as tachycardia, hyperactivity, fever, vomiting, diarrhea, diaphoresis, and flushing were minor.
• Symptoms resolved spontaneously without specific medical intervention in all affected children.
• No clear correlation was found between the estimated amount of levothyroxine ingested or serum thyroxine levels and the severity of symptoms.

Conclusions:

• Accidental levothyroxine sodium ingestion in young children typically results in mild, transient symptoms.
• A conservative management strategy is recommended for pediatric levothyroxine ingestions due to the generally benign clinical course.
• Further research may be warranted to establish definitive pediatric management guidelines for levothyroxine overdose.