There is no cure for norovirus. No antibiotic, antiviral, or prescription medication can shorten the infection. Treatment focuses entirely on managing symptoms and replacing lost fluids while the virus runs its course, which takes 1 to 3 days for most people.
Fluid Replacement Is the Core Treatment
The biggest risk from norovirus isn’t the virus itself but the dehydration that comes from hours of vomiting and diarrhea. Replacing fluids and electrolytes is the single most important thing you can do while sick.
Most adults can stay hydrated with water, fruit juices, sports drinks, and broth. Eating saltine crackers also helps replace electrolytes. For young children, oral rehydration solutions like Pedialyte or CeraLyte are the better choice because they contain a precise balance of glucose and electrolytes designed for smaller bodies. Older adults and anyone with a weakened immune system should also use oral rehydration solutions rather than relying on water alone.
Take small, frequent sips rather than gulping large amounts, especially if you’re still actively vomiting. Drinking too much at once can trigger another round of nausea. If you can keep down a few tablespoons every 10 to 15 minutes, gradually increase the amount.
Why Antibiotics and Antivirals Don’t Work
Norovirus is a virus, so antibiotics have no effect. And unlike the flu, there is no approved antiviral medication for norovirus. One drug that has been tried off-label, particularly in patients with chronic norovirus infections and weakened immune systems, is a broad-spectrum antimicrobial originally licensed for parasite infections. But a 2023 study using lab-grown human intestinal tissue found it showed no meaningful antiviral activity against any of the five norovirus strains tested. A clinical trial of the same drug in chronically infected patients also failed to improve symptoms or reduce the amount of virus in stool compared to a placebo.
For now, supportive care remains the only option.
Over-the-Counter Medications for Adults
Adults can use anti-nausea, anti-diarrheal, and anti-secretory medications as add-ons to fluid replacement. These won’t speed up recovery, but they can make the worst hours more bearable and help you keep fluids down. The CDC considers these agents useful adjuncts to rehydration in adults.
The rules are different for children. Anti-diarrheal and anti-nausea medicines are not recommended for routine use in kids with stomach bugs. In rare cases where a child is vomiting so intensely that rehydration becomes impossible, a pediatrician may prescribe a specific anti-nausea medication to break the cycle and avoid the need for IV fluids.
What to Eat During Recovery
You may have heard of the BRAT diet (bananas, rice, applesauce, toast) as the go-to advice for stomach illness. Current medical guidance has moved away from that. Research shows that following a restricted diet does not help treat viral gastroenteritis, and most experts no longer recommend fasting or limiting what you eat while sick.
Once your appetite returns, you can go back to eating your normal diet even if you still have diarrhea. For children, parents should offer their usual foods as soon as they show interest in eating. Infants should continue breastfeeding or formula feeding as normal throughout the illness.
Timeline: What to Expect
Symptoms typically appear 12 to 48 hours after exposure. The first wave usually hits hard: sudden nausea, projectile vomiting, watery diarrhea, and stomach cramps. Low-grade fever, headache, and body aches are common alongside the gut symptoms. The peak intensity generally lasts 12 to 24 hours, with most people feeling significantly better within 1 to 3 days.
You remain contagious for at least a couple of days after symptoms resolve, so hand hygiene and surface disinfection matter even after you feel fine.
Signs of Dehydration to Watch For
In children, the clearest warning signs are decreased urination, dark or strong-smelling urine, lethargy, and rapid heart rate. If a child has gone more than eight hours without a wet diaper or a trip to the bathroom, that warrants a call to the doctor. A child who seems unusually listless or limp needs medical attention promptly.
In adults, watch for dizziness when standing, dry mouth, very dark urine, or producing little to no urine for several hours. Severe dehydration that can’t be managed with oral fluids may require IV rehydration in a medical setting. This is more common in children under 5, older adults, and people with weakened immune systems or chronic conditions like kidney disease or diabetes, where excess fluid loss can affect organ function more quickly.
Preventing Spread While You’re Sick
Norovirus is extraordinarily contagious, and standard cleaning won’t reliably kill it. Alcohol-based hand sanitizers are not effective against this virus. Wash your hands thoroughly with soap and water, especially after using the bathroom and before handling food.
For contaminated surfaces like countertops, toilets, and doorknobs, the CDC recommends a bleach solution with a concentration of 1,000 to 5,000 parts per million. In practical terms, that’s 5 to 25 tablespoons of standard household bleach (5% to 8% concentration) per gallon of water. Alternatively, you can use an EPA-registered disinfectant specifically labeled as effective against norovirus. Wipe down any surface that may have been exposed to vomit or stool, and wash contaminated laundry on the hottest setting available.