A “withdrawal baby” is a newborn experiencing withdrawal symptoms after being exposed to addictive substances in the womb. The medical term is neonatal abstinence syndrome (NAS). When a pregnant person regularly uses opioids or certain other drugs, those substances cross the placenta, and the baby becomes physically dependent before birth. Once the umbilical cord is cut and the drug supply stops, the baby’s body goes through withdrawal, just as an adult’s would.
How It Happens
During pregnancy, whatever enters the mother’s bloodstream can reach the baby through the placenta. If a substance is used frequently enough, the baby’s developing nervous system adapts to its presence. After delivery, the drug is slowly cleared from the baby’s tiny body with no new supply coming in, and withdrawal sets in. The severity depends on which drug was used, how much, how often, and how late into pregnancy the use continued.
Opioids are by far the most common cause. This includes heroin, prescription painkillers, and medication-assisted treatments like methadone and buprenorphine. Sedatives like benzodiazepines and barbiturates can also cause withdrawal in newborns, though symptoms may take longer to appear. The condition has become increasingly common over the past two decades. In one Canadian province that tracked births over 26 years, the rate of NAS more than tripled, rising from 2 per 1,000 live births in 1995 to nearly 8 per 1,000 by 2021, with even higher rates among families in lower income brackets.
What Withdrawal Looks Like in a Newborn
The hallmark signs are stiff muscles, trembling even while resting, and an exaggerated startle reflex. But withdrawal affects nearly every system in a newborn’s body, and the full picture can be distressing to witness.
Nervous system symptoms are usually the most noticeable. Babies cry in a distinctive high-pitched tone and are extremely difficult to comfort. They may be jittery, sleep poorly (sometimes less than an hour after feeding), and have trouble settling into a calm state. In severe cases, seizures can occur.
The baby’s ability to regulate basic body functions also becomes unstable. Heart rate and breathing may speed up. Temperature can swing high or low. Skin may look blotchy or mottled, and the baby may sweat, yawn frequently, sneeze repeatedly, or have a stuffy nose.
Feeding and digestion suffer too. These babies often feed poorly, spit up or vomit, and develop loose stools or diarrhea. The combination of poor intake and digestive trouble can lead to slow weight gain, which is one of the earliest concerns caregivers track.
When Symptoms Start
The timeline depends almost entirely on which substance the baby was exposed to. Short-acting opioids like heroin tend to cause symptoms within 24 to 48 hours of birth. Buprenorphine withdrawal typically appears between 36 and 60 hours. Methadone, which stays in the body longer, may not trigger symptoms until 48 to 96 hours after delivery, sometimes catching families off guard when a baby who initially seemed fine begins to struggle on the third or fourth day of life.
Sedative withdrawal follows an even slower timeline. Barbiturate withdrawal can take about 7 days to appear, while certain benzodiazepines may not cause symptoms for 12 to 21 days. Regardless of when withdrawal begins, symptoms can continue for up to 4 weeks after birth.
How Hospitals Assess Severity
Medical staff don’t rely on gut feelings to judge how a baby is doing. For the past 50 years, the standard tool has been the Finnegan scoring system, which rates more than 20 withdrawal signs on a point scale. Nurses assess things like how long the baby sleeps after feeding, the intensity of tremors, crying, muscle tone, skin irritation, fever, sneezing, breathing rate, feeding quality, and stool consistency. Each item earns points, and the scores are tallied every few hours, timed around feedings so normal fussiness doesn’t skew the results.
When scores consistently reach certain thresholds, it signals that comfort care alone isn’t enough and medication may be needed. However, concerns have grown that the Finnegan system can be subjective and may overestimate the need for medication in some babies.
The Eat, Sleep, Console Approach
A newer care model called Eat, Sleep, Console (ESC) has been changing how hospitals manage these babies. Instead of tracking dozens of clinical signs, ESC focuses on three simple questions: Can the baby eat well? Can the baby sleep at least an hour undisturbed? Can the baby be consoled within about 10 minutes?
ESC prioritizes non-drug comfort measures first: keeping the room dim and quiet, swaddling, skin-to-skin contact, and breastfeeding when appropriate. It also keeps mothers and babies together rather than separating them into intensive care, and it encourages parents to take an active role in soothing and assessing their infant. A major NIH-supported study found that this approach reduces both the length of hospital stays and the number of babies who need medication for withdrawal.
When Medication Is Needed
Not every withdrawal baby needs drug treatment. Many improve with comfort care alone. But when symptoms are severe enough that a baby can’t eat, sleep, or be soothed despite consistent effort, doctors may start a small dose of an opioid replacement, most commonly a liquid oral form of morphine or methadone. The goal is to ease the baby’s distress just enough to allow feeding and rest, then gradually reduce the dose over days or weeks until the baby no longer needs it.
Some babies also receive additional support medications if opioid replacement alone isn’t controlling symptoms. The weaning process is slow and careful. Once the baby is stable on a decreasing dose and meeting feeding and growth milestones, the medical team begins planning for discharge.
Hospital Stay and Going Home
Hospital stays for withdrawal babies vary widely. A baby with mild symptoms managed through comfort care may go home in under a week. A baby requiring medication and a gradual wean could stay for several weeks. Before discharge, the medical team confirms that withdrawal signs are controlled and the baby is feeding and gaining weight. Families receive a Plan of Safe Care, which outlines follow-up appointments, developmental monitoring, and support resources.
Long-Term Development
The withdrawal period itself is temporary, but prenatal opioid exposure can leave subtler marks on development. In a prospective study that followed affected infants to their first birthday, babies with a history of withdrawal scored below average in cognitive ability, language, and motor skills on standardized developmental tests. Language was the hardest-hit area, with both the ability to understand words and to express them falling below typical ranges. About 10% of the children in that study were referred for speech therapy before age 2, at an average age of around 16 months.
Broader research paints a similar picture into childhood. Children with a history of opioid exposure in the womb are more likely to experience difficulties with attention, behavior regulation, executive function (the mental skills involved in planning and self-control), and school performance. These challenges don’t affect every child, and early intervention services like speech therapy, occupational therapy, and developmental support can make a meaningful difference. The home environment, stability of caregiving, and access to services all play significant roles in shaping outcomes over time.