Most food poisoning clears up on its own within one to three days, and the most important thing you can take is fluids. Replacing lost water and electrolytes matters far more than any medication. Beyond that, a few over-the-counter options can ease symptoms, and knowing what to eat (and avoid) during recovery makes a real difference in how quickly you bounce back.
Fluids and Electrolytes Come First
Vomiting and diarrhea pull water and essential minerals out of your body fast. Dehydration is the main danger of food poisoning, not the infection itself. Your top priority is steady sipping, even when your stomach protests.
Plain water works, but it doesn’t replace the sodium and potassium you’re losing. Oral rehydration solutions are the gold standard. The formula recommended by the WHO contains glucose, sodium chloride, potassium chloride, and sodium citrate dissolved in clean water. You can buy premixed versions (Pedialyte, DripDrop, or store brands) or make a basic version at home with six teaspoons of sugar and half a teaspoon of salt per liter of water.
If you can’t stomach much, start with small sips every few minutes rather than gulping a full glass. Ice chips, broth, diluted fruit juice, popsicles, and weak uncaffeinated tea are all reasonable options while you’re actively vomiting. Avoid milk, coffee, alcohol, and anything highly acidic until your stomach settles.
Over-the-Counter Medications That Help
Two common OTC options can reduce diarrhea from food poisoning: loperamide (sold as Imodium) and bismuth subsalicylate (Pepto-Bismol or Kaopectate). Loperamide slows gut contractions, giving your intestines more time to absorb water. Bismuth subsalicylate coats the stomach lining and has mild antimicrobial properties, which can also help with nausea.
There’s one important rule: do not take either of these if you have a fever or bloody diarrhea. Those signs suggest a more aggressive bacterial or parasitic infection, and slowing down your gut can trap the pathogen inside longer. Neither medication is considered safe for infants or young children without guidance from a pediatrician.
For nausea specifically, ginger has solid clinical backing. About 1 gram of fresh ginger root per day (roughly a half-inch piece, grated into hot water or tea) has been shown to significantly reduce nausea compared to placebo. It works by calming serotonin receptors in the gut and improving stomach motility. Ginger chews, ginger ale made with real ginger, or ginger capsules are all options.
What to Eat During Recovery
While you’re actively vomiting, stick to liquids only. Once the vomiting slows, you can introduce bland, easy-to-digest foods: plain rice, toast, bananas, applesauce, saltine crackers, boiled potatoes, oatmeal, or brothy soups. This is loosely based on the old “BRAT diet” (bananas, rice, applesauce, toast), but nutritionists now say you shouldn’t limit yourself to just those four foods for more than a day. They lack protein, calcium, fiber, and several vitamins, and sticking to them too long can actually slow recovery, especially in children.
As your stomach starts to settle, add foods that are still soft but more nutritious: scrambled eggs, skinless chicken or turkey, and cooked vegetables. The goal is to return to a normal, balanced diet within two to three days. Avoid greasy, spicy, or heavily seasoned foods until you feel fully back to normal, since they can re-trigger nausea or cramping.
When Antibiotics Are Needed
The vast majority of food poisoning cases do not need antibiotics. Most are caused by viruses like norovirus, which antibiotics can’t touch, or by bacteria that your immune system clears on its own. Even common bacterial culprits like Salmonella generally don’t require antibiotic treatment in otherwise healthy adults.
Doctors typically consider antibiotics only when symptoms are severe: high fever, bloody stool, more than eight episodes of watery diarrhea per day, symptoms lasting longer than a week, or signs of the infection spreading beyond the gut. People who are very young, over 50, pregnant, or immunocompromised are more likely to need them. Importantly, for certain strains of E. coli that produce dangerous toxins, antibiotics are actively avoided because they can increase the risk of a serious kidney complication.
How Long It Lasts (by Cause)
How quickly symptoms hit and how long they stick around depends on what contaminated your food. Knowing the timeline can help you gauge whether your case is running a normal course or dragging on too long.
- Staph toxin: Hits fast, within 30 minutes to 8 hours. Usually over within a single day.
- Norovirus: Starts 12 to 48 hours after exposure. Lasts 1 to 3 days in healthy adults, up to 6 days in older adults or young children.
- Clostridium perfringens: Onset 6 to 24 hours. Typically resolves in less than 24 hours.
- Salmonella: Onset 6 hours to 6 days. Lasts 4 to 7 days.
- Campylobacter: Onset 2 to 5 days. Lasts about a week.
- E. coli: Onset 3 to 4 days on average. Most people recover in 5 to 7 days.
Some of the fastest-resolving cases (staph, Clostridium perfringens) feel brutal but burn out quickly. Others like Salmonella or E. coli can keep you miserable for close to a week, which is still considered a normal course.
Signs You Need Medical Attention
Most people recover at home, but certain red flags mean the illness has moved beyond what your body can handle alone. For adults, those include: a fever above 103°F (39.4°C), bloody vomit or stool, signs of dehydration (extreme thirst, very dark urine, dizziness, little or no urination), and diarrhea lasting more than three days.
The thresholds are lower for children. Any fever in a child under 2 warrants a call. In older children, a fever above 102°F (38.9°C), loose stools lasting more than a day, or visible signs of dehydration like weakness, dizziness, or very little urination all need prompt evaluation. The younger and smaller the child, the faster dehydration becomes dangerous.