Yes, it is safe for newborns to sleep with a pacifier, and it may actually be protective. The American Academy of Pediatrics recommends offering a pacifier at nap time and bedtime because it is associated with a lower risk of sudden infant death syndrome (SIDS). There are a few practical guidelines worth knowing to make sure you’re doing it safely.
Why Pacifiers Lower SIDS Risk
The protective effect of pacifiers during sleep is well established, though researchers are still working out exactly why it happens. One early theory was that sucking on a pacifier keeps babies in a lighter stage of sleep, making them easier to rouse if their breathing is compromised. But a study examining infant arousals found that pacifier use did not actually change how frequently or easily babies woke up, in either the back or stomach sleeping position. The protective effect likely comes from other mechanisms.
One possibility is that the pacifier’s shield helps keep soft bedding or blankets away from the nose and mouth. Another is that the sucking action may help maintain a more open airway during sleep. Researchers have also proposed that the pacifier influences brainstem signaling in ways that support basic breathing reflexes. Whatever the mechanism, the association between pacifier use and reduced SIDS risk is consistent enough that major pediatric organizations endorse the practice.
An important detail for parents: if the pacifier falls out after your baby is asleep, you do not need to put it back in. The protective effect remains even once the pacifier is no longer in the baby’s mouth.
When to Introduce a Pacifier
If you’re breastfeeding, the Mayo Clinic recommends waiting until breastfeeding and latch are well established before introducing a pacifier. For most families this means waiting a few weeks, though the exact timing varies. The concern is that switching between breast and pacifier too early could interfere with the baby learning to latch properly. If your baby is formula-fed, you can offer a pacifier from birth.
Don’t force it. Some babies simply aren’t interested. If your newborn spits the pacifier out or refuses it, that’s fine. The recommendation is to offer one, not to insist on it.
Choosing a Safe Pacifier
The U.S. Consumer Product Safety Commission requires that all pacifiers sold in the United States pass structural integrity tests and include a guard or shield large enough to prevent the entire pacifier from being pulled into a baby’s mouth and blocking the throat. The shield must also have ventilation holes so the baby can breathe even if the pacifier is pressed flat against the face. Look for pacifiers that meet these federal safety standards, which should be noted on the packaging.
You’ll find two main materials: silicone and latex. Silicone is the more popular choice for newborns. It’s non-porous, so it doesn’t trap bacteria or odors, and it holds up well to repeated cleaning and sterilization. It’s also hypoallergenic. Latex pacifiers are softer and more flexible, which some babies prefer, but they break down faster, can harbor bacteria in their porous surface, and carry a small risk of triggering a latex allergy. If you go with latex, plan to replace it more frequently and watch for any signs of deterioration like stickiness, discoloration, or changes in shape.
What to Keep Out of the Crib
The pacifier itself is safe in the crib. Pacifier accessories are not. Never attach a pacifier to a clip, string, ribbon, or stuffed animal while your baby sleeps. These items pose strangulation and choking hazards. The CPSC has issued recalls on pacifier holders where metal clips detached and became small parts a baby could choke on. During sleep, the pacifier should go in the baby’s mouth with nothing else attached to it.
Keeping Pacifiers Clean
For brand-new pacifiers, sterilize them before the first use. You can drop them in boiling water for five minutes, run them through the dishwasher (if the packaging says they’re dishwasher safe), or use a microwave sterilizer bag designed for baby products.
After that initial sterilization, regular washing with hot water and dish soap is enough for day-to-day cleaning. Let the pacifier soak for a minute in soapy water, rinse thoroughly, and air dry. Give it a wash any time it hits the floor, looks visibly dirty, or has been loose in your diaper bag. If your baby has a weakened immune system, you may want to sterilize once a week or every two weeks, but for most healthy newborns, soap and hot water do the job.
Long-Term Considerations
Pacifier use during the newborn period carries essentially no downsides beyond the breastfeeding timing consideration. The risks that parents hear about, like dental problems and ear infections, are associated with prolonged use well past infancy.
Continuous pacifier use is linked to a 33 percent higher rate of middle ear infections, with the risk increasing after 12 months of age. Dental effects become a concern later still. Children who use a pacifier beyond 18 months may develop changes in their bite, including an open bite (where the front teeth don’t fully close together) or a crossbite. These changes are more significant and harder to reverse when pacifier use continues past age three. The American Academy of Pediatric Dentistry notes that bite problems caused by pacifier use will typically resolve on their own if the pacifier is stopped before age three.
None of this is a reason to avoid pacifiers for your newborn. It’s simply a helpful timeline to keep in mind: the sleep-safety benefits are most relevant in the first year, and most experts recommend weaning off the pacifier somewhere between 12 and 18 months to avoid the ear and dental effects that come with extended use.