Nursing care
Neonatal Abstinence Syndrome nursing care: what to assess and what to do first
Written and reviewed by Dana Whitfield, RN, MSN · 4 min read · Updated September 2026
Short answer
Neonatal abstinence syndrome nursing centres on a dim, quiet environment, swaddled containment, and frequent small feeds, guided by a validated scoring tool such as the Finnegan or Eat-Sleep-Console approach. The high-pitched cry, tremors and poor feeding reflect central nervous system irritability from in-utero opioid exposure, and non-pharmacological comfort measures are first-line treatment, not an adjunct to it.
Recognising it at the bedside
The infant with NAS rarely looks subtle. The cry is high-pitched and almost inconsolable, the limbs show fine tremors that worsen with stimulation, and feeding attempts end in frantic, disorganised sucking rather than a settled latch. Sweating, sneezing, nasal stuffiness and loose stools often accompany the neurological signs, and onset timing depends on the substance and its half-life: heroin and short-acting opioids tend to produce symptoms within 24 to 48 hours, while methadone and buprenorphine exposure can delay onset to 48 to 72 hours or later.
Score what you see using a structured tool at set intervals, typically every three to four hours, and always after feeds rather than during a screaming episode that will inflate the score. Consistency between assessors matters more than which tool a unit has chosen, because trending scores drive decisions about pharmacological treatment thresholds. A single high score is a data point; a rising trend across several assessments is the finding that changes management.
Why the classic presentation misleads
The tremors and cry read as distress, and the instinct is to intervene actively — pick the infant up, rock vigorously, offer more stimulation to soothe. That instinct is backwards. An overstimulated NAS infant escalates further, because the immature nervous system cannot filter competing sensory input. What looks like a baby who needs more input actually needs less.
The environment is the intervention. Dimmed lighting, low noise, and minimal handling reduce the sensory load that drives the tremors and crying in the first place. Swaddling is not comfort in the general newborn sense; it is a specific therapeutic containment measure that reduces startle and self-stimulation. Clustering cares, dimming the room, and swaddling snugly before any handling are treatment decisions, not bedside manner.
Priority nursing actions
Establish the environment first: dim the lights, reduce ambient noise, and swaddle with hands available for self-soothing. Cluster all cares — vital signs, feeds, nappy changes, scoring — into single episodes to minimise the number of times the infant is disturbed. Offer small, frequent feeds using a slow-flow teat if bottle-fed, since the disorganised suck-swallow-breathe pattern in NAS makes standard feeding volumes and rates unsafe.
Score consistently and document objectively, using the tool's defined criteria rather than a general impression of how unsettled the infant seems. Involve the parent or caregiver in comfort measures wherever possible; skin-to-skin contact and parental holding are part of the non-pharmacological protocol, not a visiting privilege. Escalate to the prescriber when scores meet the unit's threshold for pharmacological treatment, typically morphine or methadone, and continue non-pharmacological measures alongside any medication rather than replacing them.
Labs and diagnostics to expect
Toxicology confirms exposure and guides the expected onset window. Urine toxicology is collected from the infant when possible, and meconium testing offers a longer detection window covering the last trimester, which is useful when maternal history is unclear or unreliable. A urine drug screen on the mother is often taken alongside, though results do not always align neatly with infant findings.
Baseline bloods typically include glucose, given the risk of hypoglycaemia from poor feeding and increased metabolic demand from tremors and crying, and electrolytes if feeding has been significantly disrupted. Weight is tracked daily as a functional marker: poor feeding and loose stools from NAS can produce a weight trajectory that looks like failure to thrive if scoring and feeding support are not tightly linked.
Complications and their early signs
Dehydration and weight loss develop quickly when disorganised feeding and diarrhoea combine, so daily weights and intake-output tracking are not routine housekeeping here; they are early-warning surveillance. A weight loss trend beyond the expected newborn range, combined with reduced wet nappies, signals a feeding intervention is needed before the infant becomes clinically dehydrated.
Seizures are the complication that separates NAS from a merely uncomfortable newborn. They are uncommon but occur in severe, undertreated withdrawal, and they can be subtle in a neonate — lip smacking, cycling limb movements, or apnoea rather than a dramatic tonic-clonic event. Skin breakdown from excessive movement and friction against bedding is a lower-stakes but frequent finding, and excoriated knees, elbows and nose tip warrant barrier protection and padding.
Teaching that changes outcomes
Parents often arrive carrying guilt about the diagnosis, and teaching that leads with blame closes the door to engagement. Lead instead with the practical: how to read their infant's cues, how to swaddle correctly, how to recognise overstimulation before it escalates into an unsettled feeding attempt. A parent who can swaddle snugly and dim the room at home extends the hospital's care plan past discharge.
Discharge planning should cover the expected trajectory — that symptoms typically peak within the first week and resolve over days to weeks depending on the substance and any pharmacological weaning — and connect the family to community follow-up, including paediatric surveillance for long-term neurodevelopmental monitoring. Where safeguarding involvement is already part of the care plan, nursing teaching should reinforce rather than duplicate that support, keeping the family's confidence in their own caregiving intact.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our maternity and newborn practice questions are the closest set to what this page covers.
Common questions
What is the first nursing action for a newborn showing signs of NAS?
Reduce sensory input immediately: dim the lighting, lower noise, and swaddle snugly with the infant's hands accessible. This is done before or alongside formal scoring, because an overstimulated environment will inflate the assessment and worsen the infant's symptoms.