When your toddler is vomiting, the most important thing to give them is small, frequent sips of an oral rehydration solution like Pedialyte, starting 30 to 60 minutes after the last episode of vomiting. Most toddler vomiting is caused by a stomach virus that resolves on its own within 12 to 24 hours, so your main job is preventing dehydration while the illness runs its course.
Wait Before Offering Fluids
After your toddler vomits, resist the urge to immediately hand them a cup of water or juice. Their stomach needs a brief rest. Wait 30 to 60 minutes after the last vomiting episode before offering anything to drink. Starting fluids too soon often triggers another round of vomiting, which makes dehydration worse.
How to Rehydrate in Small Steps
Once that rest period is over, start with tiny amounts. For toddlers over one year old, offer half an ounce to one ounce (about one to two tablespoons) every 20 minutes for a few hours. This feels painfully slow, but small volumes are far more likely to stay down than a full cup. If your child keeps the fluid down for an hour or two, you can gradually increase the amount.
An oral rehydration solution is the best fluid to offer. Products like Pedialyte are designed with a 1:1 ratio of sodium to glucose that matches how the gut actually absorbs water. This specific balance pulls fluid into the body far more efficiently than plain water or juice. You can offer it chilled or as frozen pops if your toddler resists drinking it.
Plain water is fine in small amounts for toddlers, but it doesn’t replace the salts and minerals lost through vomiting. If your child refuses the rehydration solution entirely, diluted broth or very diluted juice (half water, half juice) is a reasonable backup.
Fluids to Avoid
Full-strength fruit juice, soda, and sports drinks are poor choices. These beverages contain high concentrations of sugar that can actually pull water into the intestines rather than helping the body absorb it. The result is often worsened diarrhea on top of the vomiting. Juice-centered approaches to rehydration provide suboptimal nutrition and can extend the illness, according to CDC guidelines.
What About the BRAT Diet?
The BRAT diet (bananas, rice, applesauce, toast) was a staple recommendation for decades, but it’s no longer considered the best approach. CDC guidelines describe it as “unnecessarily restrictive” and note that it provides suboptimal nutrition for a child whose gut is trying to recover. The current recommendation is to return your toddler to their normal, age-appropriate diet as soon as they can tolerate it. There’s no benefit to prolonged gut rest.
In practice, this means once the vomiting has slowed and your toddler shows interest in food, offer whatever they normally eat. Bland, familiar foods are fine if that’s what they want, but you don’t need to limit them to just crackers and bananas. Starchy foods, lean proteins, fruits, vegetables, and even dairy (if they tolerate it) are all acceptable. Smaller, more frequent meals tend to go over better than large ones.
Anti-Nausea Medication
There is one medication that can help: ondansetron, an anti-nausea drug available by prescription. Pediatric guidelines recommend it as a single oral dose for children six months and older who are vomiting from a stomach virus and are becoming dehydrated or can’t keep fluids down. It doesn’t cause drowsiness, which is a significant advantage over older anti-nausea drugs. After giving it, you can start oral rehydration about 15 to 30 minutes later.
The most common side effect is a temporary increase in diarrhea, typically lasting less than 48 hours. Because of this, it’s not routinely recommended when diarrhea is already the main problem. You’ll need to call your child’s pediatrician to get a prescription, and it’s worth calling early if the vomiting is frequent enough that nothing is staying down.
Over-the-counter anti-nausea medications designed for adults should not be given to toddlers. Products containing bismuth subsalicylate are not safe for young children.
Do Probiotics Help?
Despite their popularity, probiotics don’t appear to shorten vomiting in young children. A large clinical trial run through the Pediatric Emergency Care Applied Research Network tested one of the most studied strains in 971 children aged 3 months to 4 years with stomach virus symptoms. After five days of treatment, there was no difference in the duration of vomiting, the duration of diarrhea, or the rate of spreading the illness to other household members compared to a placebo. You’re not hurting your child by giving them probiotics, but the evidence doesn’t support relying on them.
Signs Your Toddler Is Becoming Dehydrated
Most vomiting illnesses resolve without complications, but dehydration is the real danger, especially in small children who have less fluid reserve. Watch for these signs: no tears when crying, dry lips and mouth, noticeably less urine output (fewer than three wet diapers in 24 hours), and a generally listless or unusually sleepy appearance. Research has found that when two or more of these signs appear together, a child has likely lost at least 5% of their body weight in fluid, which is the threshold for moderate dehydration.
You can also check capillary refill by gently pressing on your child’s fingernail until it turns white, then releasing. Color should return in under two seconds. If it takes longer, that’s a sign of significant dehydration.
When Vomiting Is an Emergency
Certain types of vomit require immediate medical attention. If the vomit is dark green (not just yellow), this is called bilious vomiting and is treated as a sign of a possible bowel obstruction until proven otherwise. It requires urgent evaluation. Vomit that contains blood or looks like coffee grounds also warrants an emergency visit.
Other reasons to seek care quickly include vomiting that lasts more than 24 hours without improvement, signs of moderate to severe dehydration, a high fever that won’t come down, severe abdominal pain (especially in the lower right side), or if your child becomes difficult to wake. For toddlers who’ve had a recent head injury, vomiting can signal a concussion and should be evaluated promptly.