Pedialyte can be given to babies from birth, but how and when you use it depends on the child’s age. For infants under 1 year old, Pedialyte is the recommended oral rehydration solution over alternatives like juice or sports drinks. For babies under 6 months, especially those who are breastfed, you should talk to your pediatrician before offering it, since breast milk or formula is typically enough to keep them hydrated.
Infants Under 1 Year
Children’s Hospital of Philadelphia’s clinical guidelines, updated in March 2025, specify Pedialyte for children under 1 year old as the go-to oral rehydration option. That means it’s considered appropriate across infancy, but the circumstances matter more than the age alone. You’re not giving Pedialyte as a daily drink. It’s designed for situations where a baby is losing fluids from vomiting, diarrhea, or fever and needs help replacing lost water, salt, and sugar.
For babies up to about 10 months, pediatric electrolyte solutions like Pedialyte, Enfalyte, or store-brand equivalents are the recommended choices. These products have a carefully balanced 1:1 ratio of sodium to glucose, which takes advantage of a natural transport system in the small intestine. That pairing helps the gut absorb fluid far more efficiently than water alone.
Breastfed Babies Are a Special Case
If your baby is exclusively breastfed, you may not need Pedialyte at all during a mild illness. Breastfed babies are less likely to develop severe diarrhea in the first place, and many can stay hydrated through more frequent nursing sessions alone. The American Academy of Pediatrics notes that electrolyte solution should generally only be added for a breastfed infant if a doctor specifically recommends it. So the first step with a nursing baby who has diarrhea or vomiting is simply to breastfeed more often, for shorter periods.
Formula-fed babies can be offered small amounts of Pedialyte between their regular feedings if they’re showing signs of dehydration. Your pediatrician can help you decide whether to temporarily adjust the formula schedule.
Children Over 1 Year
Once a child is past their first birthday, the options broaden. CHOP guidelines allow diluted apple juice (half-strength) or sports drinks like Gatorade as alternatives for children over 1. Pedialyte still works well for toddlers and older kids, but it’s no longer the only reasonable choice. Many parents find that toddlers accept Pedialyte popsicles or flavored versions more willingly than the unflavored liquid.
How Much to Give
The goal is small, frequent sips rather than large volumes at once, especially if your child is vomiting. Clinical guidelines suggest roughly 1 to 2 milliliters per kilogram of body weight, offered every 5 minutes, with a maximum of about 30 milliliters (one ounce) per round. In practical terms, that means giving a teaspoon or two at a time and waiting a few minutes before offering more. If your child refuses fluids or keeps vomiting for more than 30 minutes, that’s a sign oral rehydration isn’t working and you need medical help.
Signs Your Child Needs It
You don’t need to give Pedialyte every time your child has a stomach bug. It becomes important when dehydration starts to set in. In babies, watch for:
- Fewer wet diapers than usual
- A sunken soft spot (fontanelle) on top of the head
- Few or no tears when crying
- Sunken eyes
- Unusual drowsiness or irritability
In older kids, dark yellow urine, peeing less often, fast breathing, or unusual tiredness are the key warning signs. Mild dehydration can usually be managed at home with an electrolyte solution. Severe dehydration, where a child is limp, unresponsive, or extremely drowsy, requires emergency care and intravenous fluids.
What Not to Use Instead
For babies under 1, plain water is not a substitute. It lacks the electrolytes a sick baby needs and, in young infants, too much plain water can dangerously dilute their blood sodium levels. Juice, soda, and sports drinks also aren’t appropriate for infants. They contain far more sugar and less sodium than pediatric electrolyte solutions, which can actually pull more water into the intestines and worsen diarrhea.
Storage After Opening
Once you open a bottle of Pedialyte or mix a powder packet, use it within 48 hours and keep it refrigerated. After that window, bacteria from the air or from contact with your child’s mouth can grow in the solution. If you’re using it for a short illness, you’ll likely go through a bottle within that time frame, but it’s worth marking the date so you don’t forget.
When Pedialyte Won’t Be Enough
Oral rehydration solutions work well for mild to moderate dehydration, but there are situations where they can’t do the job. Children who are in shock, who have signs of a bowel obstruction (such as green-tinged vomit or a severely swollen belly), or who have an altered level of consciousness need intravenous fluids in a medical setting. If your child can’t keep any fluids down despite small, frequent sips, that’s also a sign to seek medical care rather than continuing to try at home.