There is no cure for a stomach virus. No medication kills the virus itself. Your immune system clears the infection on its own, typically within one to three days. What you can do is manage symptoms, prevent dehydration, and avoid spreading the virus to others. That’s the real playbook, and doing it well can make a significant difference in how quickly you feel normal again.
Why There’s No Cure
Stomach viruses, most commonly norovirus, trigger inflammation in the lining of your stomach and intestines. Antibiotics don’t work because this is a viral infection, not bacterial. Unlike the flu, there’s no antiviral medication for gastroenteritis either. Your immune system recognizes the virus, mounts a response, and eliminates it. That process takes a few days, and most of the misery you feel (vomiting, diarrhea, cramping) is your body actively fighting the infection.
Hydration Is the Most Important Thing You Can Do
Dehydration is the main danger of a stomach virus, especially for young children and older adults. You’re losing fluids from both ends, often faster than you can replace them. The goal is to take in small, frequent sips rather than gulping large amounts, which can trigger more vomiting.
Water alone isn’t ideal because you’re also losing electrolytes like sodium and potassium. Oral rehydration solutions (sold over the counter at most pharmacies) replace both fluid and electrolytes in the right ratio. For adults, broths and diluted sports drinks can also help. Avoid sugary sodas and fruit juices, which can worsen diarrhea by pulling more water into the intestines.
A practical approach: take a few small sips every five to ten minutes. If you keep that down for 30 minutes, gradually increase the amount. If vomiting returns, wait 15 to 30 minutes and start again with smaller sips. Ice chips work well if even small sips are hard to tolerate.
What to Eat During Recovery
You may have heard of the BRAT diet (bananas, rice, applesauce, toast) as the go-to for stomach bugs. It’s actually no longer recommended by the American Academy of Pediatrics, the CDC, or the World Health Organization. The BRAT diet is low in energy, protein, fat, and fiber, and restricting yourself to those four foods can slow nutritional recovery rather than help it.
The current guidance is simpler: eat normal, balanced foods as soon as you feel able to. Start with whatever sounds tolerable. Plain crackers, chicken, eggs, potatoes, cooked vegetables, and oatmeal are all fine choices. The key is eating a variety of foods that provide protein, fat, and carbohydrates rather than limiting yourself to a narrow list. If something makes your nausea worse, skip it and try something else. Most people find that greasy, spicy, or very sweet foods are harder to handle until symptoms fully resolve.
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 experience more manageable, especially if you need to function at work or travel.
There are important exceptions. Do not use these medications if you have a fever or bloody diarrhea, both of which suggest a bacterial or parasitic infection rather than a virus. These medications are also not considered safe for infants and young children.
For nausea, ginger has modest evidence behind it. Doses of 250 mg to 1 gram per day, split into three or four portions, appear to help. You can get this from ginger capsules, ginger tea made from fresh root, or even ginger chews. Higher doses don’t seem to work better than moderate ones.
Do Probiotics Help?
Probiotics are widely recommended for stomach bugs, but the evidence is weaker than most people assume. A meta-analysis of studies in children with acute gastroenteritis found that probiotics shortened diarrhea by roughly 23 hours on average, and the proportion of children with diarrhea lasting beyond 48 hours was about 30% lower in probiotic groups. That sounds promising, but the researchers rated the overall certainty of evidence as very low due to bias in many of the studies.
If you want to try probiotics, they’re unlikely to cause harm. Strains in the Lactobacillus and Bifidobacterium families have the most data behind them. But don’t expect a dramatic difference, and don’t rely on them as a primary strategy over hydration.
Signs That Need Medical Attention
Most stomach viruses resolve without any medical care. But dehydration can become dangerous, and certain symptoms signal you need help. In adults, watch for dark-colored urine or urinating much less than normal, extreme thirst, dizziness, confusion, or skin that stays “tented” (doesn’t flatten back right away) when you pinch it. A fever of 102°F or higher, bloody or black stool, or an inability to keep any fluids down for 24 hours also warrant a call to your doctor.
In infants and young children, the warning signs are slightly different: no wet diapers for three hours, no tears when crying, a sunken soft spot on the skull, sunken eyes, rapid heart rate, or unusual irritability and sleepiness. Children dehydrate faster than adults, so these signs should prompt quick action.
How to Stop It From Spreading
Norovirus is extremely contagious. It takes fewer than 20 viral particles to infect someone, and a single episode of vomiting can release millions. The virus also survives on surfaces for days and resists many common household cleaners, including alcohol-based sprays and wipes.
Bleach is the most reliable disinfectant. The concentration matters depending on the surface:
- Countertops, tile floors, sinks: one-third cup of chlorine bleach per gallon of water
- Items that touch food or mouths: one tablespoon of bleach per gallon of water
- Porous surfaces like wooden floors: one and two-thirds cups of bleach per gallon of water
Wash contaminated clothing and bedding in hot water and dry on high heat. If someone vomits on carpet or upholstery, clean the area with paper towels first (wearing gloves), then apply a bleach-based cleaner or a hydrogen peroxide product labeled as effective against norovirus. Let the solution sit for at least ten minutes before wiping.
Hand hygiene matters more than anything else. Wash with soap and water for at least 20 seconds, especially after using the bathroom and before touching food. Hand sanitizer is significantly less effective against norovirus than soap and water. People remain contagious for at least two to three days after symptoms stop, so keep up the handwashing even after you feel better.