The best time to introduce a pacifier to a breastfed baby is after breastfeeding is well established, typically around 3 to 4 weeks of age. For formula-fed babies, you can offer one from birth. The process itself is simple: offer the pacifier during a calm moment, let your baby explore it, and don’t force it if they’re not interested. Below is everything you need to know about timing, technique, safety, and when to eventually wean off.
When to Start
If you’re breastfeeding, wait until your baby has a strong, comfortable latch and is gaining weight well before offering a pacifier. The Canadian Paediatric Society recommends never starting a pacifier until breastfeeding is fully established. For most babies, that happens somewhere between 3 and 4 weeks, though it can take longer. Introducing one too early can interfere with your baby learning to latch properly, since the sucking motion on a pacifier is different from the one used at the breast.
The exception is premature or sick babies in the hospital, who may be given a pacifier for comfort even before breastfeeding is established. If you feel your baby needs one sooner than the 3-to-4-week mark, talk to a lactation consultant first.
Formula-fed babies don’t face the same latch concerns, so there’s no reason to delay.
How to Offer the Pacifier
Choose a quiet moment when your baby is calm but alert, not when they’re hungry or mid-cry. Gently touch the pacifier to the area around their lips or cheek to trigger the rooting reflex. When your baby opens their mouth, slide the nipple in and let them close around it naturally.
If your baby spits it out, try lightly holding the pacifier in place for a few seconds or giving a very gentle tug outward. That small resistance often triggers a baby’s instinct to suck harder and hold on. If they still reject it, put it away and try again another day. Some babies take to a pacifier immediately; others need a few attempts over a week or two. A small number of babies simply never want one, and that’s perfectly fine.
You can also try dipping the pacifier in a little breast milk or formula to make it more appealing, though plain is fine too. Never dip it in honey, sugar water, or anything sweet.
Choosing the Right Pacifier
Pacifiers come in two main materials: silicone and natural rubber latex. Silicone is sturdier, holds its shape longer, doesn’t age, and can handle high-temperature sterilization including microwaving. Latex is softer and more flexible, which some babies prefer, but it breaks down faster from saliva, heat, and UV light. If anyone in your family has a latex allergy, stick with silicone.
You’ll also see “orthodontic” and “conventional” (round-nipple) shapes. Research on children aged 24 to 36 months found that conventional round pacifiers were associated with more severe open bite and overjet compared to orthodontic designs. Orthodontic pacifiers, which are flattened on one side, were also less likely to cause a posterior crossbite. Neither type is risk-free with prolonged use, but orthodontic shapes appear to be the gentler option on developing teeth.
Safety Features to Check
- Shield size: The plastic guard should be wider than your baby’s mouth so it can’t be pulled in and become a choking hazard.
- Ventilation holes: Look for at least two holes in the shield. These allow airflow if the pacifier does press against the face.
- One-piece construction: Pacifiers that are molded as a single piece are safer than multi-part designs, which can break apart.
- Age-appropriate sizing: Most brands sell sizes for 0 to 6 months and 6 to 18 months. Use the size that matches your baby’s age.
Pacifier Use and SIDS Risk
One of the strongest arguments for pacifier use during sleep is its link to a lower risk of sudden infant death syndrome (SIDS). A large analysis found that pacifier use during sleep reduced SIDS risk by about 70%. The protective effect was even more pronounced in higher-risk situations, such as when a baby was sleeping on their stomach or side, bed-sharing, or on soft bedding.
The American Academy of Pediatrics recommends offering a pacifier at nap time and bedtime. If it falls out after your baby falls asleep, you don’t need to put it back in. The benefit comes from the baby falling asleep with it, not from having it in their mouth all night.
Cleaning and Replacing Pacifiers
Sterilize new pacifiers before first use by pouring boiling water over them and letting them soak for about five minutes. For latex, this scalding method is the safest option since microwaving can damage the material. Silicone can handle microwave sterilization.
After that initial sterilization, washing with hot water and dish soap after each use is enough for most healthy babies. If your baby has a weakened immune system, sterilizing once a week or every two weeks adds an extra layer of protection. Inspect pacifiers regularly for cracks, tears, sticky spots, or discoloration. Damaged pacifiers can break apart and become choking hazards. Replace them at the first sign of wear.
Ear Infection Risk After 10 Months
Pacifier use is linked to a higher rate of middle ear infections, and the risk grows as babies get older. In children under 2, pacifier users had an average of 5.4 ear infections per year compared to 3.6 in non-users. In children aged 2 to 3, pacifier use was responsible for roughly 25% of ear infection episodes. Researchers have suggested limiting pacifier use to the first 10 months of life, when the need for non-nutritive sucking is strongest and ear infections are less common.
This doesn’t mean you need to take the pacifier away at 10 months on the dot, but it’s worth being aware of the connection. If your child starts getting frequent ear infections, reducing pacifier use is one of the first things to consider.
When to Wean Off the Pacifier
The American Academy of Pediatric Dentistry recommends beginning to limit pacifier use after 12 months because of the increasing ear infection risk, and making a more deliberate effort to discontinue it by 18 months, when the emerging canine teeth make the jaw and palate more vulnerable to changes in shape. Children who continue using a pacifier past 36 months have significantly higher rates of anterior open bite, a gap between the upper and lower front teeth when the mouth is closed.
The good news: dental changes caused by pacifier use before age 3 tend to correct themselves once the habit stops. Duration of use matters more than how often the pacifier is in your child’s mouth on any given day, so weaning gradually by shortening sessions or limiting it to sleep only is a reasonable strategy. Cold turkey works too, though it tends to involve a few rough nights.
Common approaches include cutting the tip of the pacifier so it’s less satisfying to suck on, having a “pacifier fairy” visit (similar to the tooth fairy), or simply picking a long weekend and riding it out. Most children adjust within three to seven days regardless of the method.