There is no cure for a viral stomach bug. No medication kills the virus once you have it. The good news is that most cases clear up on their own within one to three days, and the real goal during that window is keeping yourself hydrated, comfortable, and fed well enough to recover quickly. Everything below is about making that short illness as manageable as possible.
Why There’s No Quick Fix
A stomach bug, medically called viral gastroenteritis, is caused by viruses like norovirus or rotavirus. Antibiotics don’t work against viruses, and no antiviral medication targets these particular ones. Your immune system handles the job on its own, typically within 72 hours. Symptoms usually appear 12 to 48 hours after exposure and peak in the first day or two before gradually fading.
That said, “no cure” doesn’t mean “do nothing.” How you manage fluids, food, and rest during those few days makes a real difference in how miserable you feel and how fast you bounce back.
Hydration Is the Single Most Important Step
Vomiting and diarrhea drain water and electrolytes from your body fast. Replacing both is the top priority. Plain water helps, but it doesn’t contain the sodium and glucose your intestines need to absorb fluid efficiently. An oral rehydration solution works better. You can buy premade versions at any pharmacy, or make one at home using the World Health Organization’s ratio: half a teaspoon of salt and two tablespoons of sugar dissolved in about four and a quarter cups (just over one liter) of clean water.
Sip small amounts frequently rather than gulping large volumes, especially if you’re still vomiting. A few tablespoons every five to ten minutes is easier on your stomach than a full glass at once. If you can’t keep anything down, try sucking on ice chips until the nausea settles enough to take small sips. Pedialyte or similar electrolyte drinks work well for children, but avoid sports drinks with high sugar content, as excess sugar can actually pull more water into the intestines and worsen diarrhea.
What to Eat During Recovery
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s a reasonable starting point for the first day or two, but there’s no research showing it works better than simply eating bland, easy-to-digest foods more broadly. Brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereals are all equally gentle options. The key is keeping things plain and low in fat.
Once the worst has passed and your stomach feels more settled, start adding foods with more nutritional substance. Cooked squash, carrots, sweet potatoes without skin, avocado, skinless chicken or turkey, fish, and eggs are all bland enough to be tolerated while providing the protein and nutrients your body needs to rebuild. Sticking with only bananas and toast for days on end can actually slow recovery by depriving you of calories and protein.
Foods to Avoid Until You’re Fully Better
Certain foods and drinks can actively make diarrhea worse by drawing extra water into your intestines or irritating your gut lining:
- Caffeinated drinks like coffee, tea, and cola
- High-fat foods like fried foods, pizza, and fast food
- Sugary drinks including fruit juice and sweetened beverages
- Dairy products containing lactose, including milk, ice cream, and soft cheese
The dairy issue deserves special attention. A stomach bug can temporarily damage the cells lining your intestines that produce lactase, the enzyme that breaks down milk sugar. This means you may have trouble digesting dairy for up to a month after the infection clears, even if you’re normally fine with it.
Over-the-Counter Medications
Anti-diarrheal medications and bismuth-based products (the pink liquid) can reduce the frequency of bathroom trips in adults, but they come with important caveats. These medications are not safe for infants and young children. And if you have a fever or notice blood in your stool, skip the anti-diarrheal entirely. Those symptoms suggest a bacterial or parasitic infection rather than a simple viral bug, and stopping diarrhea in that situation can trap harmful bacteria inside your body.
For nausea and vomiting, there’s no great over-the-counter option for adults. Ginger tea or ginger chews may take the edge off for some people. Pain relievers like acetaminophen can help with body aches and low-grade fever. Avoid ibuprofen on an empty or irritated stomach, as it can make nausea worse.
Do Probiotics Help?
The evidence is mixed. Some studies have found that certain probiotic strains can modestly shorten the duration of diarrhea, particularly in children. But a large, well-designed trial found no benefit at all. The overall picture suggests any effect is small and inconsistent. If you want to try a probiotic, it’s unlikely to cause harm, but don’t count on it to meaningfully speed things up.
Signs That Need Medical Attention
Most stomach bugs are unpleasant but harmless. Dehydration is the real danger, especially in young children, older adults, and people with weakened immune systems. Watch for these warning signs:
- Diarrhea lasting more than 24 hours
- Inability to keep any fluids down
- Urinating much less than usual (or no wet diapers for three hours in infants)
- Unusual confusion, irritability, or excessive sleepiness
- Bloody or black stool
- Fever of 102°F (39°C) or higher
In infants and young children, a rapid heart rate is another sign of significant dehydration that warrants prompt medical evaluation.
How Long You’re Contagious
You can spread the virus before you even know you’re sick and for days after you feel better. Norovirus in particular is extremely contagious and can survive on surfaces for extended periods. During and after illness, wash your hands thoroughly with soap and water. Alcohol-based hand sanitizers are not very effective against norovirus.
If someone in your household is sick, disinfect surfaces they’ve touched using a bleach solution: 5 to 25 tablespoons of standard household bleach per gallon of water. Let the solution sit on surfaces for at least five minutes before wiping. Bathrooms, doorknobs, light switches, and faucet handles are the highest-priority targets. Wash contaminated clothing and bedding on the hottest setting your machine offers.
A Realistic Recovery Timeline
Most people feel significantly better within one to three days. The vomiting usually stops first, often within 12 to 24 hours. Diarrhea can linger a bit longer. Fatigue and a sensitive stomach may hang around for several days after the main symptoms resolve, which is normal. Ease back into your regular diet gradually, reintroduce dairy last, and give yourself permission to rest even after the worst is clearly over. Your gut lining needs time to fully repair itself, and pushing too hard too soon often leads to a relapse of discomfort.