Norovirus runs its course in 1 to 3 days for most people, and there’s no medication that kills the virus. What you can do is manage symptoms, prevent dehydration, and avoid spreading it to everyone in your household. Symptoms typically hit 12 to 48 hours after exposure, starting with nausea, vomiting, diarrhea, and stomach cramps.
Stay Hydrated Above All Else
Dehydration is the real danger with norovirus, not the virus itself. You’re losing fluids fast from both ends, and replacing them is the single most important thing you can do. Most adults can manage with water, broth, sports drinks, or diluted fruit juice. Take small, frequent sips rather than gulping large amounts, which can trigger more vomiting.
If you’re an older adult, have a weakened immune system, or are dealing with severe diarrhea, step up to an oral rehydration solution like Pedialyte. These contain a precise balance of glucose and electrolytes that water alone can’t provide. Children should always get an oral rehydration solution (Pedialyte, Naturalyte, or CeraLyte) rather than relying on water or juice, which don’t replace electrolytes effectively enough for small bodies. Saltine crackers can also help replace some electrolytes between sips of fluid.
Watch for signs of dehydration: urinating less than usual, a dry mouth and throat, dizziness when you stand up, or feeling unusually sleepy. In children, look for crying with few or no tears and unusual fussiness or sleepiness. Severe dehydration may need IV fluids at a hospital, so don’t wait if these signs are getting worse instead of better.
What to Eat During and After
For the first several hours, you may not be able to keep anything down, and that’s fine. Don’t force food. When you feel ready to try eating, start with bland, low-fiber options: bananas, plain white rice, applesauce, dry toast, saltine crackers, brothy soups, oatmeal, or boiled potatoes. These are easy to digest and unlikely to make nausea worse.
Once your stomach has settled, usually a day or two in, start adding more nutritious foods: cooked squash, carrots, sweet potatoes without the skin, avocado, skinless chicken or turkey, fish, and eggs. Rebuild your diet gradually rather than jumping straight back to normal meals.
Until you’re fully recovered, avoid these categories:
- Dairy products like milk, yogurt, cheese, and ice cream
- Caffeine and alcohol, including coffee, tea, and sodas
- Fried or greasy foods like chips, fries, and donuts
- Sugary foods like candy, cakes, and cookies
- Acidic foods like citrus fruits, tomato sauce, and vinegar-based dressings
- Spicy foods of any kind
- High-fiber foods like leafy greens, raw vegetables, nuts, seeds, beans, and popcorn
Over-the-Counter Medications
There’s no antiviral for norovirus, but some adults find relief with anti-diarrheal medications like loperamide (Imodium) or bismuth subsalicylate (Pepto-Bismol). These won’t shorten the illness, but they can make it more manageable. One important exception: skip these entirely if you have bloody diarrhea or a fever, which could signal a different condition that needs medical attention.
Do not give children store-bought anti-diarrheal medications unless a doctor specifically recommends it. These drugs can interfere with a child’s ability to clear the virus.
Stop It From Spreading
Norovirus is extraordinarily contagious, and you remain infectious for up to two weeks after your symptoms are gone. That’s a long window. During your illness and for at least a few days after recovery, take these steps seriously.
Wash your hands with soap and water, not just hand sanitizer. Alcohol-based sanitizers are not reliably effective against norovirus. Scrub thoroughly after using the bathroom, before touching food, and after any contact with contaminated surfaces. If you’re the sick person, stay out of the kitchen entirely. Don’t prepare food for others while symptomatic or for at least two days after symptoms resolve.
For cleaning surfaces, regular household cleaners won’t cut it. You need a bleach solution: mix 5 to 25 tablespoons of standard household bleach (5% to 8% concentration) per gallon of water. Alternatively, use a disinfectant that’s EPA-registered specifically against norovirus. Focus on bathrooms, door handles, light switches, and any surface the sick person has touched. Wash contaminated laundry and linens on the hottest setting available, and handle them carefully to avoid shaking virus particles into the air.
Who Faces Higher Risk
Norovirus is miserable for everyone, but certain groups face a longer and more dangerous course. Adults over 65 are more likely to experience severe outcomes, longer-lasting diarrhea, and a slower recovery. If you’re caring for an elderly person with norovirus, monitor hydration closely and be quicker to seek medical help if symptoms aren’t improving after two to three days.
Infants and young children under two deserve extra caution. Babies can shed higher amounts of virus than older children or adults, and infants under six months may continue shedding the virus for more than two weeks after symptoms stop. This means keeping them away from other small children longer than you might expect. For any child showing signs of dehydration, crying without tears, unusual sleepiness, or decreased wet diapers, get medical attention promptly. Small bodies have less margin before dehydration becomes dangerous.
People with weakened immune systems, whether from medication, chronic illness, or other conditions, should use oral rehydration solutions from the start rather than waiting to see if plain water is enough. Their recovery timeline may extend well beyond the typical three days.
What Recovery Looks Like
Most people feel the worst during the first 24 hours, with vomiting and diarrhea peaking and then gradually tapering. By day two or three, the acute symptoms are typically gone, though you may feel wiped out and have a reduced appetite for several more days. This is normal. Your gut lining took a beating and needs time to heal, which is why easing back into food slowly matters.
The lingering fatigue catches many people off guard. Even after the vomiting and diarrhea stop, you may feel weak and low-energy for a few days. This is mostly from fluid and electrolyte loss. Keep drinking, keep eating bland foods, and give yourself permission to rest. You’ll bounce back faster than you think, but pushing it too early, especially with exercise or heavy meals, can set you back.