Are one or two dangerous? Opioid exposure in toddlers
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Updated: Aug 17, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Deepak K Sachdeva1, John M Stadnyk
1Department of Emergency Medicine, Georgetown University, Washington, DC, USA.
Insights
Opioid ingestions in children under 6 can cause severe toxicity. Methadone is particularly dangerous, even in small doses, requiring emergency observation and potential hospital admission for all pediatric ingestions.
Area of Science:
- Toxicology
- Pediatric Emergency Medicine
- Pharmacology
Background:
- Opioid analgesics are commonly prescribed for pain management.
- Pediatric ingestions of opioids can lead to significant central nervous system and respiratory depression.
- Determining the safety of low-dose opioid ingestions in young children is crucial for clinical management.
Purpose of the Study:
- To review the medical literature and assess the risks associated with low-dose opioid ingestions in children under 6 years old.
- To identify specific opioids that pose a higher risk of toxicity in pediatric populations.
- To establish guidelines for observation and management of pediatric opioid ingestions.
Main Methods:
- A comprehensive review of existing medical literature was conducted.
- Studies focusing on opioid ingestions in pediatric patients under 6 years of age were analyzed.
- Data on toxicity, required observation periods, and outcomes were extracted and synthesized.
Main Results:
- Methadone was identified as the most toxic opioid, with even single-tablet ingestions potentially leading to fatal outcomes.
- Children ingesting any amount of methadone require at least 6 hours of Emergency Department (ED) observation and consideration for hospital admission.
- Other opioids are generally better tolerated in single or double tablet ingestions; doses of codeine equivalent to 5 mg/kg or more necessitate 4 to 6 hours of ED observation.
- Limited data exist for propoxyphene and extended-release formulations, suggesting longer observation periods due to prolonged half-lives.
- Opioid ingestions resulting in respiratory or central nervous system depression require intensive care unit admission.
Conclusions:
- Pediatric opioid ingestions, particularly methadone, pose a significant risk of toxicity.
- Specific observation protocols based on the type and dose of opioid ingested are necessary for children under 6.
- Prompt recognition and management of respiratory and central nervous system depression are critical in pediatric opioid ingestions.
Abstract:
Ingestions of opioid analgesics by children may lead to significant toxicity as a result of depression of the respiratory and central nervous systems. A review of the medical literature was performed to determine whether low doses of opioids are dangerous in the pediatric population under 6 years old. Methadone was found to be the most toxic of the opioids; doses as low as a single tablet can lead to death. All children who have ingested any amount of methadone need to be observed in an Emergency Department (ED) for at least 6 h and considered for hospital admission. Most other opioids are better tolerated in ingestions as small as one or two tablets. Based on the limited data available for these opioids, we conclude that equianalgesic doses of 5 mg/kg of codeine or greater require 4 to 6 h of observation in the ED. Data for propoxyphene and all extended-release preparations are limited; their prolonged half-lives would suggest the need for longer observation periods. All opioid ingestions leading to respiratory depression or significant central nervous system depression require admission to an intensive care unit.
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