Most cases of diarrhea can be managed at home with a combination of fluids, simple dietary changes, and over-the-counter remedies. The priority is replacing lost water and electrolytes, since dehydration is the main risk, not the diarrhea itself. With the right approach, acute episodes typically resolve within two to three days.
Start With Fluids and Electrolytes
Every loose stool pulls water and essential minerals out of your body. Plain water helps, but it doesn’t replace the sodium and potassium you’re losing. The most effective rehydration uses a balanced mix of water, salt, and a small amount of sugar. The World Health Organization’s oral rehydration formula works because glucose and sodium are absorbed together in the gut at a 1:1 ratio, and the sugar actively pulls water back into your system along with it.
You don’t need to buy a special product, though premade oral rehydration solutions (like Pedialyte or Drip Drop) are convenient and precisely balanced. Broth, coconut water, and diluted sports drinks also work. Avoid full-strength fruit juice and regular soda. Both are high in sugar, which can actually pull more water into the intestine and make diarrhea worse. Sip fluids steadily throughout the day rather than drinking large amounts at once.
What to Eat (and What to Skip)
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s fine for the first day or two, but there’s no clinical evidence that restricting yourself to only those four foods speeds recovery. A broader range of bland, easy-to-digest foods gives your body more of the protein and nutrients it needs to heal. Good options include brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereal. Once your stomach settles, add cooked carrots, butternut squash, avocado, skinless chicken, fish, and eggs.
Certain foods and ingredients reliably make diarrhea worse. The biggest culprits fall into three categories:
- High-fructose foods and drinks. Fructose stimulates the gut to secrete extra water and electrolytes. People who consume more than 40 to 80 grams of fructose per day commonly develop diarrhea. Peaches, pears, cherries, apples, fruit juice, and soda are the main sources.
- Sugar alcohols. Sorbitol, mannitol, and xylitol, found in sugar-free gum, candy, and some medications, have a strong osmotic effect that draws water into the bowel.
- Greasy or fried foods. When fat isn’t fully absorbed in the small intestine, it reaches the colon and gets broken down into fatty acids. These fatty acids trigger the colon to secrete fluid, worsening loose stools.
Dairy can also be a problem during an acute episode. Temporary lactose intolerance is common when the gut lining is inflamed, so hold off on milk and ice cream until you’re feeling better.
Over-the-Counter Medications
Two widely available medications can reduce symptoms while your body fights off the underlying cause.
Loperamide (sold as Imodium) slows down intestinal movement, giving your gut more time to absorb water. The standard approach for adults is two caplets after the first loose stool, then one caplet after each subsequent loose stool, up to a maximum of four caplets in 24 hours for the over-the-counter tablet form. It works well for run-of-the-mill viral or traveler’s diarrhea but should not be used if you have a fever above 101°F, bloody stools, or a suspected bacterial infection, since slowing the gut in those situations can trap harmful bacteria inside.
Bismuth subsalicylate (Pepto-Bismol, Kaopectate) treats both diarrhea and the nausea that often accompanies it. It can turn your tongue dark and your stools grayish black, which looks alarming but is harmless and temporary. Because it contains a compound related to aspirin, avoid it if you’re allergic to aspirin or taking blood thinners.
Probiotics That Shorten Recovery
Two probiotic strains have the strongest clinical support for acute diarrhea. Lactobacillus rhamnosus GG (often labeled LGG) and Saccharomyces boulardii, a beneficial yeast, have both been shown to shorten the duration of infectious diarrhea by roughly one day. The effective dose in studies was at least 10 billion colony-forming units (CFU) per day, typically taken for 5 to 10 days.
The European Society for Paediatric Gastroenterology confirmed these two strains as their top recommendations for acute gastroenteritis, along with Limosilactobacillus reuteri. Look for products that list the specific strain on the label and store them according to the package directions, since many probiotics need refrigeration. People with weakened immune systems should avoid probiotic supplements.
Herbal Options
Chamomile tea is one of the better-studied herbal remedies for gut complaints. In a randomized trial of patients with diarrhea-predominant irritable bowel syndrome, taking chamomile extract daily for four weeks reduced defecation frequency from about 3.4 times daily to 1.3 times daily. By the end of the trial, 95% of participants who started with watery diarrhea had normal stool consistency. Chamomile acts as a mild antispasmodic, relaxing the muscles of the intestinal wall. Ginger tea may also calm nausea, though the evidence for its effect on diarrhea specifically is less robust. Both are safe for most adults and worth trying alongside other measures.
Antibiotic-Related Diarrhea
Diarrhea is one of the most common side effects of antibiotics, which can disrupt the balance of bacteria in your gut. Mild cases usually clear up on their own a few days after you finish the course, or your doctor may switch you to a different antibiotic. Keep up your fluid intake and consider bismuth subsalicylate for symptom relief.
The exception is a C. difficile infection, which antibiotics can trigger by wiping out the normal bacteria that keep C. difficile in check. If diarrhea is severe, watery, happening more than three times a day, or accompanied by fever and abdominal cramping during or after antibiotic use, contact your doctor. C. difficile requires specific treatment and you should not take loperamide for it, since slowing gut motility can worsen the infection.
When Diarrhea Needs Medical Attention
Most diarrhea resolves on its own, but certain signs mean it’s time to call a doctor. For adults, seek care if diarrhea persists beyond two days, you notice blood or black color in your stool, you develop severe abdominal or rectal pain, you have a fever above 101°F (38.3°C), or you show signs of dehydration like dark urine, dizziness, or dry mouth.
For children, the timeline is shorter. Call your pediatrician if a child’s diarrhea doesn’t improve within 24 hours, or if the child has a fever above 101°F, bloody or black stools, or signs of dehydration such as no tears when crying, a dry mouth, or no wet diapers for three hours or more. The WHO also recommends zinc supplementation for children with acute diarrhea: 20 mg per day for 10 to 14 days (10 mg per day for infants under six months), which has been shown to reduce both the severity and duration of episodes.