Management of Neonatal Abstinence Syndrome

Initial Hospital Management

Infants at risk for NAS should be carefully monitored in the hospital using standardized assessment tools like the modified Neonatal Abstinence Scoring System to evaluate withdrawal severity 1, 2
Initial treatment focuses on minimizing environmental stimuli by placing the infant in a dark, quiet environment, careful swaddling, and responding early to infant signals 2, 3
The appropriate duration of hospital observation depends on the maternal drug history, with heroin-exposed infants typically showing withdrawal signs within 24 hours of birth 4

83% of US clinicians use an opioid (morphine or methadone) as the first-choice medication for treating NAS 5
Phenobarbital is commonly used as a second-line agent if opioid therapy doesn't adequately control withdrawal symptoms 5
Daily morphine doses typically range from 0.24 mg/kg to 1.3 mg/kg per day 1
Paregoric is no longer recommended due to toxic ingredients, and diazepam has fallen out of favor due to lack of efficacy and adverse effects on feeding reflexes 5

Hospital discharge timing depends on the specific opioid exposure:
- Infants exposed to short-acting opioids may be safely discharged if no withdrawal signs appear by 3 days of age 1, 2
- Infants exposed to longer-acting opioids like methadone should be observed for a minimum of 5-7 days before discharge consideration 1, 2

Outpatient pediatricians are responsible for monitoring ongoing withdrawal symptoms which may persist up to 6 months after birth 4
Outpatient pediatricians are responsible for monitoring feeding difficulties and weight gain 5
Outpatient pediatricians are responsible for monitoring developmental milestones and neurological status 6

Seizures occur in 2-11% of infants withdrawing from opioids and require close monitoring 4
Abnormal EEG results without overt seizure activity have been reported in >30% of neonates with NAS 4

Long-term neurodevelopmental follow-up is essential as subacute signs of opioid withdrawal may last up to 6 months 4

Studies have not definitively addressed whether long-term morbidity related to neonatal drug withdrawal is decreased by pharmacologic management 1