Most food poisoning resolves on its own within one to three days, and the single most important thing you can do is stay hydrated while your body clears the infection. There’s no magic cure that stops food poisoning instantly, but the right combination of fluids, rest, and smart eating choices can shorten your misery and prevent complications.
How Long Food Poisoning Actually Lasts
How quickly you recover depends on what made you sick. The fastest cases, like those caused by Staphylococcus aureus (often from food left at room temperature), can hit within 30 minutes and clear up in about a day. Norovirus, the most common culprit, typically starts 12 to 48 hours after exposure and lasts one to three days. Salmonella takes four to seven days to run its course, while Campylobacter can linger for about a week.
In other words, if your symptoms started within hours of eating something questionable, you’re likely dealing with a shorter illness. If symptoms didn’t appear for a day or more, expect a longer recovery window. Either way, the strategies below will help you get through it.
Hydration Is the Priority
Vomiting and diarrhea drain fluid and electrolytes fast. Replacing them is the most effective treatment for food poisoning, more important than any medication. Adults with active vomiting or diarrhea need roughly three liters of oral rehydration fluid per day. Children need about one liter, and babies and toddlers need about half a liter.
Plain water alone isn’t ideal because it doesn’t replace the sodium and potassium you’re losing. Oral rehydration solutions (sold as Pedialyte, DripDrop, or store-brand equivalents) are designed with the right balance of salt and sugar to help your intestines absorb fluid efficiently. You can also use the WHO method: dissolve a packet of oral rehydration salts in one liter of clean water.
Take small, frequent sips rather than gulping large amounts, especially if you’re still vomiting. A few tablespoons every few minutes is easier for your stomach to handle than a full glass at once. If you can’t keep even small sips down for several hours, that’s a sign you may need medical attention.
Signs You’re Getting Dehydrated
Watch for dark-colored urine, which is one of the earliest and easiest signs to track. If you pinch the skin on the back of your hand and it doesn’t flatten back right away, that’s another warning sign. Dizziness when standing, a dry mouth, and producing very little urine all point to dehydration that needs aggressive fluid replacement.
What to Eat During Recovery
You’ve probably heard of the BRAT diet (bananas, rice, applesauce, toast), but current research doesn’t support restricting your diet when you have diarrhea. According to the National Institute of Diabetes and Digestive and Kidney Diseases, most experts no longer recommend fasting or following a restricted diet during food poisoning. When your appetite returns, you can go back to eating your normal foods, even if diarrhea hasn’t fully stopped.
That said, your appetite will likely guide you naturally. During the worst of the vomiting, don’t force food. Once you feel ready to eat, start with whatever sounds tolerable. Many people find bland, low-fat foods easier on their stomach in the first day or two, but this is about comfort, not medical necessity. For children, parents should offer their usual foods as soon as hunger returns. Infants should continue receiving breast milk or formula throughout the illness.
A few things are worth avoiding while you’re still symptomatic: alcohol, caffeine, and very sugary drinks can all worsen diarrhea. Dairy bothers some people during gut infections but not everyone, so use your own judgment.
Over-the-Counter Medications
Two common options can help manage diarrhea symptoms: loperamide (sold as Imodium) and bismuth subsalicylate (Pepto-Bismol or Kaopectate). These can reduce the frequency of diarrhea and make you more comfortable while your body fights off the infection.
However, there’s an important safety rule: do not use these medications if you have a fever or bloody diarrhea. Those symptoms suggest a bacterial or parasitic infection where your body needs to expel the pathogen, and slowing your gut down can make things worse. Neither medication is safe for infants or young children without a doctor’s guidance.
For nausea, rest and small sips of fluid are your best tools. Lying still with your head slightly elevated can help. Some people find that sucking on ice chips is easier to tolerate than drinking when nausea is severe.
Preventing Spread to Others
Many foodborne illnesses, especially norovirus, are extremely contagious. A few precautions can keep the rest of your household from getting sick.
- Handwashing over hand sanitizer. Wash with soap and water for at least 20 seconds after using the bathroom and before touching food. Hand sanitizer does not work well against norovirus.
- Stay away from the kitchen. Don’t prepare food for others while you’re sick, and wait at least 48 hours after your last symptoms before handling anyone else’s food.
- Disinfect contaminated surfaces. Regular cleaning sprays aren’t strong enough. Use a bleach solution of 5 to 25 tablespoons of household bleach per gallon of water, and leave it on the surface for at least five minutes. Alternatively, use a disinfectant that’s EPA-registered against norovirus.
- Handle laundry carefully. Clothes or bedding that may have been contaminated should be removed immediately, handled without shaking (which can spread virus particles into the air), and washed with detergent on the hottest, longest cycle available. Dry on the highest heat setting.
When cleaning up after someone has vomited or had diarrhea, wear disposable gloves, wipe the area with paper towels first, bag those towels, then clean the area with soap and hot water before applying the bleach solution.
When Symptoms Need Medical Attention
Most food poisoning doesn’t require a doctor visit, but certain symptoms signal something more serious. The CDC recommends seeking medical care if you have diarrhea lasting more than three days, a fever above 102°F, or vomiting so frequent that you can’t keep any liquids down. Bloody stools, signs of severe dehydration, or symptoms that suddenly worsen after seeming to improve also warrant a call to your doctor.
Certain people are at higher risk for complications: young children, adults over 65, pregnant women, and anyone with a weakened immune system. For these groups, the threshold for seeking care should be lower. A doctor can test stool samples to identify the specific pathogen and, in bacterial cases, may prescribe targeted treatment to speed recovery.