Most food poisoning resolves on its own within one to three days, and the single most important thing you can do is replace the fluids and electrolytes you’re losing. Antibiotics aren’t needed in the vast majority of cases. What follows is a practical guide to managing symptoms at home, knowing what to eat and avoid, and recognizing the warning signs that mean it’s time to get medical help.
Fluid Replacement Is the Priority
Vomiting and diarrhea drain water and essential salts from your body fast. Replacing them is the cornerstone of food poisoning treatment. If you can keep liquids down, drink water, diluted fruit juice, sports drinks, or broth in small, frequent sips. Saltine crackers help replace sodium as well. Small sips work better than large gulps, especially when nausea is still active.
If you’re losing fluids faster than you can replace them, or you’re an older adult, have a weakened immune system, or are experiencing severe diarrhea, switch to a commercial oral rehydration solution like Pedialyte. These contain a precise balance of sugar and salts that your intestines absorb more efficiently than plain water. For children with food poisoning, an oral rehydration solution is the go-to from the start, and infants should continue breast milk or formula as usual.
You can also make a basic rehydration drink at home using the World Health Organization’s formula: about 4 cups of water, half a teaspoon of salt, and 2 tablespoons of sugar. Stir until dissolved and sip throughout the day. This isn’t a perfect substitute for a commercial product, but it works in a pinch.
How to Spot Dehydration Early
Mild dehydration shows up as darker urine and less frequent trips to the bathroom. That’s your first signal to increase fluid intake. As dehydration progresses, you may notice a dry mouth and throat, dizziness when standing up, and a faster heart rate. In children, look for irritability, no tears when crying, and a dry mouth. Skin that stays “tented” when you pinch it instead of snapping back is another warning sign of moderate dehydration.
Severe dehydration is a medical emergency. In adults, it looks like confusion, extreme thirst, and little to no urination. In children, watch for lethargy, mottled skin, and rapid breathing. If you see these signs, get to an emergency room.
What to Eat (and What to Skip)
The old advice to stick to bananas, rice, applesauce, and toast (the BRAT diet) is outdated. Research shows that following a restricted diet doesn’t help treat diarrhea and may actually slow recovery by depriving your body of needed nutrients. Once your appetite returns, go back to eating your normal diet, even if diarrhea hasn’t fully stopped.
That said, a few categories of food and drink tend to make symptoms worse while your gut is still inflamed:
- Caffeine (coffee, tea, some sodas) can stimulate your intestines and worsen diarrhea.
- High-fat foods like fried foods, pizza, and fast food are harder to digest.
- Sugary drinks and fruit juices can pull more water into your intestines.
- Dairy products may cause trouble for up to a month or more after food poisoning, because the infection can temporarily reduce your ability to digest lactose.
You don’t need to force yourself to eat if you’re not hungry. But once hunger returns, eating a full, varied diet gives your body the fuel it needs to recover.
Over-the-Counter Medications
Anti-diarrheal medications like loperamide (Imodium) can reduce the frequency of trips to the bathroom, but they aren’t appropriate for every case. Avoid them entirely if you have a fever, bloody or black stools, or severe abdominal pain. In those situations, diarrhea is your body’s way of clearing a more serious infection, and slowing it down can make things worse.
For nausea, over-the-counter options containing bismuth subsalicylate (Pepto-Bismol) can help settle your stomach. Plain acetaminophen can bring down a mild fever and ease body aches. Avoid ibuprofen or aspirin on an empty or irritated stomach, as they can worsen nausea.
Do Probiotics Help?
There’s reasonable evidence that probiotics can shorten the duration of infectious diarrhea. Studies suggest a dose of at least 5 billion colony-forming units per day for a minimum of five days to see a benefit. One clinical trial found that a probiotic-fermented milk reduced the duration of fever during a norovirus outbreak. Probiotics won’t stop food poisoning in its tracks, but they may help your gut flora recover faster. Look for products that list a specific CFU count on the label.
How Long Symptoms Last
The timeline depends on what made you sick. The three most common culprits look quite different:
Staph food poisoning hits the fastest, usually within one to six hours of eating contaminated food (often improperly stored meats, egg salads, or cream pastries). It causes sudden, severe nausea and vomiting but typically burns out within 24 to 48 hours.
Norovirus, the most common cause of foodborne illness, starts 12 to 48 hours after exposure. Vomiting tends to dominate in children, diarrhea in adults. Most people recover within 12 to 60 hours. Raw produce, shellfish, and food handled by an infected person are the usual sources.
Salmonella takes 6 to 48 hours to appear and lasts longer, typically four to seven days. It brings diarrhea, fever, and abdominal cramps. Undercooked eggs, poultry, and unpasteurized dairy are common sources.
When Food Poisoning Needs Medical Treatment
Most cases don’t require a doctor. But certain symptoms signal something more serious is happening. The CDC recommends seeking medical care if you experience:
- Bloody diarrhea
- Diarrhea lasting more than 3 days
- A fever over 102°F (39°C)
- Vomiting so frequent you can’t keep any liquids down
- Signs of dehydration: very little urination, dry mouth and throat, dizziness when standing
Antibiotics are reserved for specific situations. They’re generally considered for people who are immunocompromised, elderly, or who develop severe symptoms like high fever, bloody stools, or rapidly worsening illness. For most healthy adults, antibiotics aren’t needed and won’t speed recovery from the typical viral or mild bacterial case.
A Note on Infants and Honey
Infant botulism, though rare, is a distinct danger for babies under 12 months. Honey is the most well-known source. Unlike typical food poisoning, botulism causes neurological symptoms: constipation first, then poor feeding, a weak cry, drooping eyelids, a flattened facial expression, and floppy muscle tone. If a baby who recently consumed honey (or any suspicious food) develops these symptoms, this is a medical emergency requiring immediate treatment. Don’t wait for test results, as doctors treat based on symptoms alone.