Neonatal abstinence syndrome happens when a baby exposed to opioids or certain other substances in the womb goes through withdrawal after birth — and in recent years a baby has been diagnosed with it roughly every 15 to 20 minutes in the United States. It can sound frightening, but NAS is well understood, very treatable, and the great majority of affected babies recover well with proper care. Just as importantly, the way to reduce its severity is not shame or avoidance of medical care, but exactly the opposite: honest, early engagement with treatment during pregnancy.
This guide explains what NAS is, the signs to watch for, how it is scored and treated, the outlook for affected babies, and why compassionate, non-judgmental care matters so much. Updated April 2026. Reviewed by the RehabPulse editorial team. This is educational and not medical advice.
The 60-second answer
| Question | Short answer |
|---|---|
| What is NAS? | Withdrawal in a newborn exposed to substances before birth |
| What causes it? | Most often opioids; also some other substances |
| When do symptoms appear? | Usually within the first few days after birth |
| What are the signs? | Tremors, high-pitched crying, feeding and sleep problems |
| How is it treated? | Soothing care first; medication taper if needed |
| What's the outlook? | Most babies recover well with proper care |
| Should moms avoid treatment in pregnancy? | No — treatment reduces harm; avoidance increases it |
| Is it the mother's "fault"? | It is a medical condition best met with care, not blame |
The single most important message: most people don't know that for a pregnant woman with opioid dependence, the recommended path is usually to stay in treatment (often on methadone or buprenorphine), not to quit abruptly — because sudden withdrawal can endanger the pregnancy, while supervised treatment leads to better outcomes for both mother and baby. NAS is a manageable, treatable condition, and the single best thing anyone can do to improve outcomes is to engage openly with medical care rather than hide out of fear or shame.
What neonatal abstinence syndrome is
Neonatal abstinence syndrome (NAS) is a group of withdrawal symptoms that can occur in a newborn who was exposed to addictive substances — most commonly opioids — while in the womb. During pregnancy, these substances cross the placenta, so the baby becomes physically dependent along with the mother. After birth, that supply suddenly stops, and the baby experiences withdrawal, just as an adult would, but in a tiny, vulnerable body.
A few key facts to frame it:
- Opioids are the most common cause (the term neonatal opioid withdrawal syndrome, or NOWS, is used specifically for opioid exposure), but other substances can contribute.
- It is a recognized, well-studied medical condition, not a moral verdict — and it has become more common alongside the opioid epidemic.
- It is treatable, and with appropriate care the large majority of babies do well.
- Severity varies depending on the substance, the amount and timing of exposure, and the individual baby.
For the broader picture of substance use in pregnancy, our addiction during pregnancy guide covers the maternal side, and the medications often involved are explained in our medication-assisted treatment guide.
Picture this: a baby born to a mother who has been stably treated with buprenorphine throughout her pregnancy under medical supervision. The baby may still develop NAS and need monitoring and soothing care — but because the pregnancy was managed, the mother got consistent prenatal care, and the team was prepared, the baby is watched closely from birth, treated promptly, and goes home healthy. The medication didn't prevent NAS entirely, but the engaged, supervised care produced the best possible outcome for both. That is the model the entire medical field recommends.
The signs of NAS
NAS symptoms usually appear within the first few days after birth (timing depends on the substance), and they affect several body systems. Common signs include:
- Neurological — tremors or shaking, a distinctive high-pitched cry, irritability, difficulty being soothed, exaggerated reflexes, and (in severe cases) seizures.
- Feeding and digestive — poor feeding, uncoordinated sucking, vomiting, diarrhea, and poor weight gain.
- Sleep — trouble sleeping and being easily disturbed.
- Body regulation — sweating, fever or temperature instability, fast breathing, stuffy nose, and yawning or sneezing.
Because these signs overlap with other newborn issues, NAS is diagnosed by a medical team using the baby's history of exposure plus structured observation. The hospital staff are trained to recognize and assess it, which is one more reason honest disclosure of substance use to the care team is so valuable — it lets them watch for and treat NAS promptly rather than being caught off guard.
How NAS is scored and treated
Treatment has evolved significantly, and the modern approach emphasizes gentle, family-centered care first:
| Element | What it involves |
|---|---|
| Assessment/scoring | Structured tools (e.g., Finnegan score or the Eat-Sleep-Console approach) |
| Non-medication care first | Soothing, low stimulation, skin-to-skin, supportive feeding |
| Rooming-in | Keeping baby with mother to support bonding and soothing |
| Breastfeeding when appropriate | Encouraged in many cases (e.g., stable on methadone/buprenorphine) |
| Medication if needed | A gentle opioid taper (e.g., morphine) for more severe cases |
| Monitoring | Close observation until symptoms resolve |
How it works in practice:
- Scoring guides care. Teams use structured assessments to gauge severity and decide what's needed. The newer "Eat, Sleep, Console" (ESC) model focuses on whether the baby can eat, sleep, and be consoled, prioritizing comfort care and reducing unnecessary medication.
- Comfort care comes first. A quiet, dimly lit environment, swaddling, gentle rocking, skin-to-skin contact, frequent small feedings, and keeping the baby with the mother (rooming-in) are the foundation, and often enough on their own.
- Medication for more severe cases. When symptoms are severe, babies may be given a controlled, gradually tapered dose of an opioid (such as morphine) to ease withdrawal safely, then weaned off.
- Breastfeeding can help. For mothers stable on methadone or buprenorphine and not using other substances, breastfeeding is often encouraged and can actually ease the baby's symptoms and support bonding.
This gentle, comfort-first approach reflects a broader, less punitive philosophy of care — similar in spirit to the harm-reduction principles in our what is harm reduction guide: meet people where they are, reduce harm, and support rather than shame.
The outlook and why care matters
Two things are worth holding together here: realism about NAS and genuine hope.
- Short-term recovery is generally good. With proper treatment, the great majority of babies with NAS recover from the acute withdrawal well. The symptoms, while distressing, are manageable and resolve.
- Longer-term outcomes are shaped by care and environment. Research on long-term effects continues, and outcomes are strongly influenced by ongoing care, a stable nurturing environment, early-childhood support, and the mother's recovery. This is where continued support makes a real difference.
- Engagement beats avoidance, every time. The single biggest factor parents can influence is engaging with care — prenatal treatment, honest disclosure, and follow-up support all improve outcomes, while fear-driven avoidance worsens them.
Imagine two pregnant women with opioid dependence. One, terrified of judgment and of losing her baby, hides her use and avoids prenatal care; she arrives at delivery with no support in place, and the baby's NAS catches everyone unprepared. The other enters supervised treatment, gets consistent prenatal care, and tells her team honestly; her baby's NAS is anticipated, promptly treated with comfort-first care, and she's connected to support to continue her recovery and care for her child. The difference in outcomes is enormous — and it comes down to whether fear or care won. That is exactly why the system increasingly responds to maternal substance use with support (such as Plans of Safe Care) rather than punishment; our losing custody for drug use guide covers how engagement protects families.
If you are pregnant and struggling with substances, please reach out — early, honest care is the best thing for you and your baby. The SAMHSA national helpline (1-800-662-HELP) is free, confidential, and available 24/7. Other resources on RehabPulse:
Frequently asked questions
What is neonatal abstinence syndrome? Neonatal abstinence syndrome (NAS) is a group of withdrawal symptoms in a newborn who was exposed to addictive substances — most commonly opioids — in the womb. The substances cross the placenta, so the baby becomes physically dependent; after birth, that supply stops and the baby experiences withdrawal. When opioids are the cause, it is sometimes called neonatal opioid withdrawal syndrome (NOWS). It is a recognized, treatable medical condition, and most affected babies recover well with proper care.
What are the symptoms of NAS? Symptoms usually appear within the first few days after birth and span several systems: neurological signs like tremors, a high-pitched cry, irritability, difficulty being soothed, and (rarely) seizures; feeding and digestive problems like poor feeding, vomiting, diarrhea, and poor weight gain; trouble sleeping; and body-regulation signs like sweating, temperature instability, fast breathing, stuffy nose, yawning, and sneezing. A medical team diagnoses NAS using the baby's exposure history plus structured observation.
How is neonatal abstinence syndrome treated? Modern treatment emphasizes gentle, comfort-first care: a quiet, low-stimulation environment, swaddling, skin-to-skin contact, frequent small feedings, and keeping the baby with the mother (rooming-in), often guided by the Eat-Sleep-Console approach. Breastfeeding is encouraged for mothers stable on methadone or buprenorphine. For more severe cases, babies may receive a controlled, gradually tapered dose of an opioid such as morphine to ease withdrawal safely, with close monitoring until symptoms resolve.
Should a pregnant woman with opioid dependence stop taking opioids? Not abruptly, and not without medical guidance. The recommended approach for opioid dependence in pregnancy is usually to stay in supervised treatment, often with methadone or buprenorphine, because sudden withdrawal can endanger the pregnancy, while medication-assisted treatment leads to better outcomes for both mother and baby. The baby may still develop NAS, but managed care produces far better results than either continued unmanaged use or dangerous abrupt cessation.
What is the long-term outlook for babies with NAS? The short-term outlook for recovery from acute withdrawal is generally good — most babies with NAS recover well with proper treatment. Longer-term outcomes are strongly shaped by ongoing care, a stable and nurturing environment, early-childhood support, and the mother's continued recovery, and research in this area continues. The most important factor parents can influence is engaging with care — prenatal treatment, honest disclosure, and follow-up support all meaningfully improve outcomes.
Sources and references
- Centers for Disease Control and Prevention (CDC). Neonatal Abstinence Syndrome / Opioid Use During Pregnancy. cdc.gov
- National Institute on Drug Abuse (NIDA). Treating Opioid Use Disorder During Pregnancy. nida.nih.gov
- National Library of Medicine (MedlinePlus). Neonatal abstinence syndrome. medlineplus.gov
- Substance Abuse and Mental Health Services Administration (SAMHSA). Substance Use During Pregnancy / Plans of Safe Care. samhsa.gov
- SAMHSA. National Helpline — 1-800-662-HELP (4357), free and confidential 24/7. samhsa.gov/find-help/national-helpline
- National Institutes of Health (NIH) / Eunice Kennedy Shriver National Institute of Child Health and Human Development. Neonatal Abstinence Syndrome. nichd.nih.gov
- SAMHSA. FindTreatment.gov treatment locator. findtreatment.gov
