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Treatment of guanfacine toxicity with naloxone

Daniel S Tsze1, Peter S Dayan

  • 1Division of Pediatric Emergency Medicine, Department of Pediatrics, Columbia University College of Physicians and Surgeons, New York, NY, USA. dst2141@columbia.edu

Pediatric Emergency Care
|October 5, 2012
PubMed

Insights

Guanfacine toxicity in a child was treated with naloxone, reversing symptoms like lethargy and abnormal heart rate. This case highlights naloxone as a potential antidote for guanfacine overdose.

Area of Science:

  • Pediatric Emergency Medicine
  • Clinical Toxicology
  • Pharmacology

Background:

  • Guanfacine, an alpha-2 adrenergic agonist, is used for ADHD and hypertension.
  • Extended-release formulations can lead to prolonged drug exposure.
  • Overdose can cause significant central nervous system and cardiovascular effects.

Observation:

  • A 4-year-old boy presented with lethargy, bradycardia, and fluctuating blood pressure after ingesting extended-release guanfacine.
  • Initial symptoms included hypertension followed by hypotension.
  • Standard supportive care was initiated.

Findings:

  • Naloxone administration resulted in rapid improvement of the patient's level of consciousness.
  • Cardiovascular parameters, including blood pressure and heart rate, normalized following naloxone treatment.
  • This is the first reported case of naloxone effectively treating guanfacine toxicity symptoms.

Implications:

  • Naloxone may be a valuable therapeutic option for managing guanfacine toxicity.
  • Early recognition and intervention are crucial in pediatric guanfacine overdose cases.
  • Further research is warranted to confirm naloxone's efficacy and optimal dosing in guanfacine poisoning.

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