You can’t cut a stomach bug short once it starts, but you can shorten the misery, prevent dehydration, and keep it from tearing through your household. Most stomach bugs are caused by norovirus, which typically runs its course in one to three days. What you do during and after those days determines how rough the experience is and whether everyone else in your home gets it too.
Why You Can’t Kill It Once You Have It
Stomach bugs are almost always viral, and there’s no antiviral medication that works against norovirus. Antibiotics do nothing here. Your immune system has to fight it off on its own, which it usually does within 24 to 72 hours. The real work, then, is managing symptoms, staying hydrated, and aggressively preventing spread.
Fluids Are the Most Important Thing
The biggest risk from a stomach bug isn’t the virus itself. It’s dehydration from vomiting and diarrhea. Your body loses water, salt, and sugar rapidly, and replacing all three is what keeps you out of the emergency room.
Oral rehydration solutions (like Pedialyte or store-brand equivalents) work better than water alone because they contain the right balance of electrolytes and glucose. If you don’t have any on hand, diluted juice, broth, or sports drinks are reasonable substitutes. Sip small amounts frequently rather than gulping large quantities, which can trigger more vomiting. A few tablespoons every 10 to 15 minutes is a good starting pace. Once you can keep that down for an hour or two, gradually increase the volume.
For infants and young children, watch for dry diapers. No wet diaper for three hours or more is a red flag. In adults, not urinating at all, a rapid heartbeat, rapid breathing, confusion, or fainting all signal severe dehydration that needs immediate medical attention.
What to Eat During Recovery
The old BRAT diet (bananas, rice, applesauce, toast) is fine for the first day or two, but there’s no evidence it works better than simply eating bland, easy-to-digest foods. Brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereals are all good options. The key is choosing foods that are gentle on your stomach while still providing some nutrition.
Once the worst has passed and you can keep food down reliably, start adding back more nutrient-dense choices: cooked carrots, sweet potatoes without skin, avocado, skinless chicken or turkey, fish, and eggs. These are still bland enough to tolerate but contain the protein and vitamins your body needs to recover. Sticking to only bananas and toast for days on end can actually slow your recovery by depriving you of essential nutrients.
Be Careful With Anti-Diarrheal Medication
Over-the-counter anti-diarrheal medications can reduce the number of trips to the bathroom, but they’re not always safe to use. If you have a fever, blood in your stool, or mucus in your stool, skip these medications entirely. Those symptoms can indicate a bacterial infection, and slowing down your gut in that situation can trap the bacteria inside and make things significantly worse.
Anti-diarrheal medication should also never be given to children under two years old. For anyone using it, if symptoms haven’t improved within 48 hours, stop taking it. And if you develop abdominal distension or severe constipation while using it, discontinue immediately.
Stopping the Spread in Your Home
This is where most people fail, and it’s why stomach bugs rip through entire households. Norovirus is extraordinarily tough. It can survive on dry surfaces at room temperature for up to 28 days. It can persist in carpets for 12 days even with regular vacuuming. On keyboards, mice, and phones, it’s been detected 72 hours after contamination. A tiny number of viral particles (fewer than 20) is enough to infect someone.
Standard cleaning won’t cut it. You need a bleach solution: 5 to 25 tablespoons of regular household bleach (5% to 8% concentration) per gallon of water. That’s a strong solution, so wear gloves and ventilate the area. Hit every surface the sick person has touched, including toilet handles, faucets, doorknobs, light switches, and remote controls. EPA-registered disinfectants labeled effective against norovirus also work, but many common household cleaning sprays do not.
Alcohol-based hand sanitizer is not reliable against norovirus. The virus lacks the outer coating that alcohol is good at disrupting. Soap and water with thorough scrubbing for at least 20 seconds is the only hand hygiene method you should rely on. This is non-negotiable for everyone in the household, especially after using the bathroom and before eating.
Laundry and Shared Spaces
Wash any contaminated clothing, towels, or bedding immediately. Use the hottest water setting available and tumble dry on high heat. Handle soiled items carefully, at arm’s length, and wash your hands thoroughly afterward. If someone vomits on carpet, clean the visible mess, then apply your bleach solution (test a small area first) or an enzymatic cleaner rated for norovirus. Vacuuming alone will not eliminate the virus.
Give the sick person their own bathroom if possible. If you share one, disinfect it after every use by the sick person. Designate separate towels, cups, and utensils. The person who is ill should not prepare food for anyone else.
You’re Still Contagious After Feeling Better
One of the most common mistakes is resuming normal life the moment symptoms stop. You remain contagious for at least two to three days after your last episode of vomiting or diarrhea. During that window, you should avoid preparing food for others, minimize close contact when possible, and continue rigorous hand washing. If your job involves handling food or caring for vulnerable people, stay home for the full two to three days after recovery.
What About Probiotics?
Probiotics are widely marketed for gut health, and many people reach for them during or after a stomach bug. The evidence, however, is underwhelming. A meta-analysis of studies on probiotics for diarrhea found no statistically significant reduction in how long symptoms lasted. That doesn’t mean probiotics are harmful, but they’re unlikely to speed your recovery in any noticeable way. Your money and effort are better spent on proper rehydration and nutrition.
Lingering Gut Issues After Recovery
About 1 in 10 people who get a gut infection develop a condition called post-infectious irritable bowel syndrome. Symptoms include cramping, bloating, and changes in bowel habits that can persist for weeks or months after the original infection has cleared. This doesn’t mean the virus is still active. It means the infection temporarily altered the way your gut nerves and muscles function. For most people, these symptoms gradually resolve on their own, but if they persist beyond a few weeks, it’s worth discussing with a doctor to rule out other causes and manage discomfort.