There is no cure for a stomach virus. No medication, antibiotic, or supplement will kill the virus or shorten the illness. The good news is that most people recover on their own within one to three days, and the single most important thing you can do is stay hydrated while your body fights it off.
What doctors call viral gastroenteritis is almost entirely managed through supportive care: replacing fluids, eating when you can, and riding it out. Here’s how to do that effectively and avoid the complications that actually land people in the hospital.
Why Antibiotics and Antivirals Won’t Help
Antibiotics treat bacterial infections, not viral ones. Taking them for a stomach virus does nothing except expose you to side effects. There is also no antiviral medication approved for common stomach viruses like norovirus or rotavirus. Your immune system clears the infection on its own, typically within 24 to 72 hours for most healthy adults.
Fluid Replacement Is the Real Treatment
Vomiting and diarrhea drain your body of water and electrolytes fast. Dehydration, not the virus itself, is the main danger. For most adults, sipping water, clear broths, or oral rehydration solutions (like Pedialyte or store-brand equivalents) throughout the day is enough. Sports drinks work in a pinch but contain more sugar than ideal.
Take small, frequent sips rather than gulping large amounts, especially if you’re still 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, you’re on the right track. Ice chips are a good starting point when even sips feel like too much.
For infants and young children, continue breastfeeding or formula as normal. Oral rehydration solutions designed for children are the best option for supplemental fluids.
What to Eat During Recovery
You may have heard of the BRAT diet (bananas, rice, applesauce, toast), but current guidance doesn’t recommend restricting your diet. Research shows that following a limited diet does not help treat viral gastroenteritis. When your appetite returns, go back to eating your normal foods, even if you still have diarrhea.
That said, your body will tell you what it can handle. Many people naturally gravitate toward bland, starchy foods in the first day or two simply because those feel easier on the stomach. That’s fine. The key is not to force yourself to fast or avoid entire food groups in the name of recovery. Eating helps your gut lining repair itself.
Over-the-Counter Medications That Help (and Don’t)
Adults can use loperamide (Imodium) or bismuth subsalicylate (Pepto-Bismol) to manage diarrhea symptoms. These won’t speed up recovery, but they can make the experience more tolerable, especially if you need to function during the day. Loperamide should not be given to young children without guidance from a pediatrician.
If vomiting is severe and you can’t keep any fluids down for more than several hours, a doctor can prescribe anti-nausea medication. This is worth pursuing because the inability to keep fluids down is the fastest path to dehydration.
Probiotics Probably Won’t Help
Two large clinical trials published in The New England Journal of Medicine tested popular probiotic strains in children with gastroenteritis. In both studies, recovery was nearly identical whether kids took a probiotic or a placebo. The researchers concluded probiotics added no measurable benefit and weren’t worth the cost. While some people swear by them, the clinical evidence for stomach viruses specifically is not there.
Signs of Dehydration to Watch For
Mild dehydration shows up as slightly decreased urination, dry mouth, and increased thirst. You can usually correct this at home by drinking more fluids. Moderate dehydration means little or no urine output, sunken eyes, and noticeable fatigue. This needs more aggressive fluid intake and possibly medical attention.
Severe dehydration is a medical emergency. The signs include a rapid, weak pulse, no tears when crying (in children), rapid breathing, cool or mottled skin, and extreme lethargy or confusion. Children and older adults are most vulnerable. Severe dehydration requires IV fluids in a hospital setting because the gut can no longer absorb fluids fast enough to catch up.
How Long You’re Contagious
This is where most people underestimate stomach viruses. You can still spread norovirus for two weeks or more after you feel completely better. The virus continues shedding in your stool long after symptoms resolve. This means hand hygiene matters well beyond the days you’re actively sick.
Wash your hands thoroughly with soap and water after using the bathroom. Alcohol-based hand sanitizers are less effective against norovirus than actual handwashing. If someone in your household is sick, clean contaminated surfaces with a bleach solution: 5 to 25 tablespoons of standard household bleach per gallon of water. Regular household cleaners and disinfectant wipes may not kill norovirus. You can also look for EPA-registered products specifically labeled as effective against norovirus.
Wash any contaminated clothing or bedding on the longest available cycle with hot water and machine dry. Avoid preparing food for others while you’re symptomatic and ideally for at least two days after symptoms stop.
Timeline for Recovery
Most healthy adults feel significantly better within one to three days. The vomiting usually stops first, often within 24 hours. Diarrhea can linger for a few days longer. Fatigue and a slightly off appetite may hang around for up to a week, which is normal.
Children, older adults, and people with weakened immune systems may take longer to recover and face higher risks of dehydration. For these groups, it’s worth being more vigilant about fluid intake from the very start of symptoms rather than waiting until dehydration sets in.