If you can’t keep liquids down, the most important first step is to stop trying for a while. Give your stomach a full rest of at least a few hours before attempting anything, then restart with tiny sips of water or ice chips every 15 minutes. Pushing fluids too fast on an irritated stomach almost always triggers more vomiting, which makes dehydration worse. The goal is to sneak hydration past your stomach in amounts small enough that it doesn’t fight back.
Rest Your Stomach First
After your last episode of vomiting, wait at least 30 to 60 minutes before putting anything in your mouth. This gives your stomach lining and the muscles around it time to calm down. Many people make the mistake of immediately drinking water because they feel thirsty or worry about dehydration, but your stomach needs that pause.
When you’re ready, start with ice chips. Let them melt in your mouth rather than chewing and swallowing. If ice chips stay down for 15 to 20 minutes, move to small sips of water, about one to two tablespoons at a time. Keep that pace going: one to two tablespoons every 15 to 20 minutes for at least a couple of hours. It feels painfully slow, but it works far better than gulping half a glass.
What to Drink Once Water Stays Down
Once plain water has stayed down for an hour or two, you can introduce other clear liquids. Good options include clear broth, watered-down electrolyte drinks, ice pops, and gelatin. Electrolyte drinks help replace the sodium and potassium you’ve lost from vomiting, but dilute them with water at first since full-strength versions can be too sugary for a sensitive stomach. Avoid milk, juice, coffee, and alcohol, all of which can trigger a new round of nausea.
Temperature matters. Room-temperature or slightly cool liquids tend to be gentler than very cold or hot drinks. Flat ginger ale is a popular home remedy, though the evidence behind ginger for nausea is modest. It won’t hurt, but don’t rely on it as your primary fluid source since it’s mostly sugar and water without the electrolytes you need.
When to Try Eating Again
Once you’ve kept liquids down for several hours and your appetite starts returning, begin with small amounts of bland, easy-to-digest food. Applesauce, plain toast, crackers, bananas, and plain oatmeal are reliable starting points. Eat slowly, in small portions. Greasy, spicy, or dairy-heavy foods are likely to bring the nausea back, so hold off on those for at least a day or two after your last vomiting episode.
Don’t worry if your appetite takes a full day to come back. As long as you’re keeping fluids down, the food can wait.
Over-the-Counter Nausea Medicines
If you’re vomiting everything you drink, keeping a pill down is obviously a challenge. But if you can manage it, a few options may help. Bismuth subsalicylate (the active ingredient in Pepto-Bismol) works by coating and protecting the stomach lining. Antihistamine-based options like dimenhydrinate (Dramamine) dull your body’s nausea signals, though they work best for motion-related nausea and can cause drowsiness.
If you truly can’t swallow a tablet, some pharmacies carry chewable or liquid versions. Antiemetic suppositories are also available by prescription for people who can’t tolerate oral medications at all.
Recognizing Dangerous Dehydration
Your body can handle a few hours of not keeping liquids down. But dehydration becomes dangerous when it goes on too long. Watch for these warning signs:
- Very dark urine or no urine at all for 8 or more hours
- Rapid heartbeat that doesn’t calm down when you’re resting
- Confusion or unusual irritability
- Dizziness when standing that doesn’t pass
- Dry mouth with no tears when crying
If someone loses consciousness, has a seizure, or shows sudden mental confusion, that’s a 911 situation. Severe dehydration can affect heart rhythm and brain function quickly.
Special Risks for Babies and Young Children
Small children dehydrate much faster than adults because of their size. For babies under one year, use a syringe or spoon to give one to two teaspoons of an oral rehydration solution every few minutes. For toddlers and older children, aim for about half an ounce to one ounce (one to two tablespoons) every 20 minutes.
In infants, specific dehydration signs include a sunken soft spot on top of the head, fewer wet diapers than usual, and crying without producing tears. If a baby under three months is vomiting repeatedly or an older child can’t keep any fluids down for more than a few hours, they need medical evaluation. Children go from “a little dehydrated” to “seriously dehydrated” much faster than adults do.
Special Risks for Older Adults
Older adults face a double problem. The kidneys naturally lose about half their filtering capacity between age 30 and 80, and their ability to concentrate urine drops by roughly 20% after age 60. This means an older person’s body is already less efficient at conserving water under normal circumstances. Add vomiting on top of that, and dehydration can escalate quickly.
People with cognitive decline, dementia, or those living alone may not recognize how dehydrated they’re becoming. If you’re caring for an older person who can’t keep liquids down, keep a closer eye on their mental sharpness than you normally would. Confusion or sudden drowsiness in an elderly person who’s been vomiting warrants prompt medical attention.
Pregnancy and Severe Vomiting
Morning sickness is common, but there’s a line where it becomes a medical condition called hyperemesis gravidarum. The distinction matters: hyperemesis involves persistent vomiting severe enough to cause weight loss of 5% or more of pre-pregnancy body weight, along with dehydration and metabolic disruption. It’s one of the leading causes of hospitalization in early pregnancy.
If you’re pregnant and genuinely unable to keep any liquids down for more than 12 hours, or you’re losing weight noticeably, that crosses into territory that typically requires IV fluids and medical support. Don’t try to tough it out, because the dehydration affects both you and the pregnancy.
What Happens If You Need the ER
If the small-sip method fails and you still can’t keep anything down after 12 to 24 hours (shorter for children, elderly people, or pregnant women), medical treatment usually means IV fluids. A needle is placed in a vein, and a solution of sterile water with small amounts of salt or sugar is dripped in slowly. The type of fluid and the rate depend on how dehydrated you are and your overall health.
IV rehydration bypasses your stomach entirely, so it works even when nothing will stay down orally. Most people start feeling dramatically better within an hour or two once fluids are flowing. Depending on what’s causing the vomiting, you may also receive anti-nausea medication through the IV.
Common Causes Worth Knowing
Stomach viruses (gastroenteritis) cause the majority of short-term vomiting episodes and typically resolve within one to three days. But persistent vomiting that lasts longer, keeps coming back, or doesn’t follow an obvious pattern can have less obvious causes: gallbladder disease, peptic ulcers, pancreatitis, appendicitis, bowel obstruction, or metabolic issues like diabetic ketoacidosis. Pregnancy is another common cause that people sometimes overlook in the moment. Certain medications, particularly when taken on an empty stomach, can also trigger vomiting that becomes a self-reinforcing cycle.
If you’re dealing with a one-time stomach bug, the sip-and-wait approach usually gets you through. If vomiting keeps returning without a clear explanation, or if it comes with severe abdominal pain, fever above 102°F, or blood in the vomit, the cause needs investigation beyond home care.