There is no cure for norovirus. No antiviral medication or antibiotic will shorten the illness. Treatment is entirely about managing symptoms, staying hydrated, and waiting it out. Most people recover within one to three days without medical intervention.
Symptoms typically appear 12 to 48 hours after exposure and hit fast: vomiting, watery diarrhea, stomach cramps, and sometimes a low-grade fever. The priority during those days is replacing the fluid your body is losing.
Why Hydration Is the Main Treatment
Vomiting and diarrhea together can drain your body of water and electrolytes remarkably quickly. Dehydration is the most common complication of norovirus, and it’s the reason some people (especially young children and older adults) end up in the emergency room. Everything else about norovirus treatment is secondary to getting fluids back in.
Water alone isn’t ideal because it doesn’t replace the sodium and potassium you’re losing. Oral rehydration solutions are the gold standard. You can buy premade versions at any pharmacy, or you can make a basic one at home using the World Health Organization’s formula: half a teaspoon of salt and two tablespoons of sugar dissolved in about four cups of water. That simple ratio of salt and sugar helps your intestines absorb the fluid more efficiently than plain water.
If you’re vomiting frequently, take small sips rather than gulping a full glass. A few tablespoons every five to ten minutes is easier on your stomach than trying to drink a large amount at once. As vomiting slows down, you can gradually increase how much you drink.
What to Eat During and After
You don’t need to fast or follow a restricted diet. Research shows that limiting what you eat doesn’t actually help you recover faster from viral gastroenteritis. Eat what you can tolerate, but be aware that certain foods are more likely to worsen diarrhea while your gut is inflamed:
- Caffeine (coffee, tea, cola) can speed up your gut and worsen diarrhea.
- High-fat foods like fried food, pizza, and fast food are harder to digest when your intestines are irritated.
- Very sugary drinks including fruit juice and soda can pull more water into your intestines and make diarrhea worse.
- Dairy products may cause problems because your gut can temporarily lose its ability to digest lactose. This can last a month or more after the infection clears.
Plain, starchy foods like rice, toast, bananas, and broth tend to be well tolerated. But the key point is to eat if you’re hungry. Your body needs energy to recover.
Over-the-Counter Medications
Adults can use loperamide (Imodium) or bismuth subsalicylate (Pepto-Bismol) to reduce diarrhea. These won’t speed up your recovery, but they can make the worst hours more manageable, especially if you need to sleep or can’t stay near a bathroom.
These medications are not safe for infants and young children. If your child has norovirus, talk to their pediatrician before giving any over-the-counter medicine. And for anyone, if you notice blood in your stool or develop a high fever, skip the anti-diarrheal medications entirely. Those symptoms can signal a bacterial infection that needs different treatment.
For pain and fever, acetaminophen is generally easier on an already-irritated stomach than ibuprofen or aspirin.
Caring for Children With Norovirus
Children, especially babies and toddlers, dehydrate faster than adults because of their smaller body size. Oral rehydration solutions designed for children (like Pedialyte) are the best option. Small, frequent sips or spoonfuls work better than offering a full bottle or cup.
Watch for signs that dehydration is getting serious: no wet diapers for three hours or more, crying without tears, unusual drowsiness, or a dry mouth. These warrant a call to your pediatrician or a trip to urgent care. For mild dehydration, the general clinical guideline is about 50 milliliters of rehydration fluid per kilogram of body weight over four hours. For a 10-kilogram toddler (around 22 pounds), that works out to roughly two cups over four hours, plus a little extra after each episode of diarrhea.
If your child is breastfeeding, continue breastfeeding. Breast milk provides both fluid and nutrients, and there’s no reason to stop during a stomach virus.
When Dehydration Becomes Dangerous
Most healthy adults and older children ride out norovirus at home without problems. But dehydration can become a medical emergency in certain situations. Get medical help if you or someone you’re caring for shows any of these signs:
- Confusion or difficulty staying alert
- No urination for many hours
- Rapid heartbeat or rapid breathing
- Fainting or dizziness when standing
Older adults, people with chronic illnesses, and anyone who can’t keep even small sips of fluid down for more than 12 hours are at higher risk. In these cases, hospital treatment with intravenous fluids may be necessary to correct the dehydration.
Stopping the Spread at Home
Norovirus is extraordinarily contagious. A tiny amount of virus is enough to infect someone else, and you remain contagious for at least two days after symptoms stop. How you clean during and after the illness matters as much as how you treat it.
Wash your hands with soap and water, not hand sanitizer. Alcohol-based sanitizers are not effective against norovirus. The physical action of scrubbing with soap and rinsing with water is what removes the virus from your hands.
For surfaces, regular household cleaners won’t cut it either. The CDC recommends a chlorine bleach solution: 5 to 25 tablespoons of standard household bleach (5% to 8% concentration) per gallon of water. That’s a noticeably strong solution. Use it on countertops, bathroom surfaces, doorknobs, and any area that may have been contaminated by vomit or stool. You can also use an EPA-registered disinfectant specifically labeled as effective against norovirus.
Wash contaminated clothing and linens on the hottest setting your machine allows, and dry them on high heat. Clean the washing machine drum afterward if someone vomited on the fabric. Keep the sick person’s towels, utensils, and drinking glasses separate from the rest of the household until at least 48 hours after their last symptoms.
How Long Recovery Takes
The acute phase of vomiting and diarrhea typically lasts one to three days. Most people feel dramatically better by day three or four. But your digestive system may stay sensitive for a week or two afterward. Loose stools, mild nausea, and fatigue can linger even after the virus itself is gone. The temporary difficulty digesting dairy products can persist for a month or longer in some people, so reintroduce milk and cheese gradually.
There is currently no vaccine available for norovirus, though at least one candidate is in advanced clinical trials with results expected in the coming years. For now, the best protection is thorough handwashing, proper surface disinfection, and avoiding close contact with infected people during and after their illness.