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Updated: Aug 6, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Treatment of neonatal abstinence syndrome
K Johnson1, C Gerada, A Greenough
1Children Nationwide Regional Neonatal Intensive Care Centre, Department of Child Health, King's College Hospital, London SE5 9RS, UK. kathryn.2.johnson@kcl.ac.uk
Insights
Neonatal abstinence syndrome (NAS) treatment requires more research. Opioids show promise for NAS infants, but optimal drug choice and regimen remain undetermined.
Area of Science:
- Neonatal Abstinence Syndrome (NAS) research
- Pediatric pharmacology
- Substance withdrawal in newborns
Background:
- Neonatal Abstinence Syndrome (NAS) affects infants experiencing withdrawal from substances due to in utero exposure.
- Affected infants often require extended hospitalization and treatment.
- Current treatment options for NAS have limited evidence supporting their efficacy.
Purpose of the Study:
- To review the current evidence on drug efficacy for treating Neonatal Abstinence Syndrome (NAS).
- To identify gaps in research regarding optimal pharmacotherapy for NAS.
- To evaluate the effectiveness of different drug classes and regimens for NAS management.
Main Methods:
- Systematic review of randomized controlled trials (RCTs) and comparative studies on NAS pharmacotherapy.
- Analysis of evidence for opioid versus non-opioid treatments.
- Comparison of different opioid agents and combination therapies.
Main Results:
- Opioids are suggested as the most appropriate treatment for NAS, particularly for infants exposed to diamorphine or methadone.
- Diazepam has demonstrated ineffectiveness in head-to-head trials for NAS.
- Morphine and methadone are common, but comparative efficacy data from RCTs are lacking.
- Efficacy of single-agent versus multi-drug regimens for poly-substance exposed infants requires further investigation.
Conclusions:
- Further research, including randomized trials, is essential to determine the most beneficial opioid and optimal treatment strategy for Neonatal Abstinence Syndrome.
- Evidence supports opioids over other agents like diazepam for NAS, but comparative data between morphine and methadone is needed.
- The best approach for infants exposed to multiple substances in utero remains an open question requiring dedicated research.
Abstract:
Neonatal abstinence syndrome (NAS) is suffered by infants withdrawing from substances on which they have become physically dependent after in utero exposure. They may require prolonged treatment and spend weeks or even months in hospital. A wide range of drugs have been used to treat NAS. The efficacy of few, however, have been adequately investigated. Evidence suggests that opioids are the most appropriate, at least in infants exposed to diamorphine or methadone. In all "head to head" trials, diazepam has been shown to be ineffective. Morphine and methadone are currently the most commonly prescribed opioids to treat NAS, but randomised trials have not been undertaken to determine which is the more beneficial. Many infants with NAS have been exposed to multiple substances in utero. Further research is required into whether a single opiate or a multiple drug regimen is the best option for such patients.
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