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Massive levothyroxine ingestion. Conservative management.

S H Mandel1, A R Magnusson, B T Burton

  • 1Doernbecher Memorial Hospital for Children, Oregon Health Sciences University, Portland.

Clinical Pediatrics
|August 1, 1989
PubMed
Summary

A child

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Area of Science:

  • Pediatric Endocrinology
  • Clinical Toxicology

Background:

  • Levothyroxine (T4) overdose in children presents a unique clinical challenge.
  • Assessing the severity and management of acute levothyroxine ingestion is crucial for pediatric care.

Observation:

  • A 29-month-old girl ingested 90 tablets (18 mg) of levothyroxine.
  • Despite significantly elevated initial thyroxine (T4) and triiodothyronine (T3) levels, clinical symptoms were mild, including irritability, vomiting, tremor, and tachycardia.
  • Treatment involved activated charcoal and propranolol.

Findings:

  • Thyroid hormone levels normalized within 13 days post-ingestion.
  • The child experienced a benign clinical course.
  • Mild symptoms in children following massive levothyroxine ingestion are common.

Implications:

  • Propranolol can effectively manage symptoms of acute levothyroxine overdose in children.
  • A conservative management approach is recommended, avoiding aggressive or potentially harmful therapies.
  • This case highlights the generally mild clinical outcomes in pediatric levothyroxine ingestions.

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