Most cases of diarrhea clear up on their own within a few days, but the right combination of fluids, food choices, and over-the-counter options can speed recovery and keep you comfortable in the meantime. Acute diarrhea, the most common type, typically lasts less than a week. If yours has persisted for more than two weeks, that’s considered persistent diarrhea, and anything lasting four weeks or longer is chronic, both of which point to an underlying cause worth investigating.
Replace Fluids First
Dehydration is the main risk with diarrhea, not the diarrhea itself. Every loose stool pulls water and electrolytes out of your body faster than normal, so replacing them is the single most important thing you can do. Water alone isn’t ideal because it doesn’t replace the sodium and potassium you’re losing. Oral rehydration solutions (sold at any pharmacy) contain the right balance of salt, sugar, and water to help your intestines absorb fluid efficiently. Broth, diluted fruit juice, and coconut water also work.
Sip small amounts frequently rather than gulping large volumes, which can trigger more cramping. If you notice dark urine, dry mouth, dizziness, or extreme thirst, you’re already moderately dehydrated and need to increase your intake aggressively.
What to Eat (and What to Skip)
You don’t need to starve yourself. Eating helps your gut recover. The goal is soft, low-fiber, mildly flavored foods that are easy to digest. Good choices include white rice, plain toast or crackers made with refined flour, bananas, applesauce, boiled potatoes, eggs, broth-based soup, lean baked chicken or whitefish, and cooked vegetables. Gelatin, popsicles, and weak tea are also gentle options.
Avoid anything that stimulates your gut or draws extra water into your intestines. That means skipping:
- Caffeine, which speeds up intestinal contractions
- Alcohol, which irritates the gut lining and worsens dehydration
- Sugar-free gum and candy containing sorbitol or other sugar alcohols, which are poorly absorbed in the small intestine and pull water into the colon, directly causing osmotic diarrhea
- Greasy or fried foods, which are hard to digest when your gut is already inflamed
- Raw vegetables, seeds, nuts, and whole grains, all high in insoluble fiber that can aggravate loose stools
- Spicy foods and strong seasonings
- High-fat dairy like ice cream or cream-based sauces (low-fat dairy is usually fine)
Gradually reintroduce your normal diet as stools firm up, usually over two to three days.
Over-the-Counter Medications
Loperamide (the active ingredient in Imodium) works by slowing down the muscular contractions of your intestines, giving them more time to absorb water. It’s available as tablets, capsules, and liquid. For most adults, it can reduce the frequency of loose stools within a few hours. If your diarrhea hasn’t improved after two days of use, stop taking it and talk to a doctor.
Bismuth subsalicylate (the active ingredient in Pepto-Bismol) takes a different approach: it reduces inflammation in the gut lining and has mild antibacterial properties. It can also help with the nausea and cramping that often accompany diarrhea.
One important note: neither of these medications is appropriate for young children. The CDC specifically advises against antidiarrheal drugs in infants and children because of the risk of serious side effects, including dangerous abdominal swelling. For kids, the focus should be entirely on fluid replacement. Elderly adults should also use loperamide cautiously, as it carries a small risk of heart rhythm problems.
Probiotics Can Shorten Recovery
Probiotics, particularly strains like Saccharomyces boulardii and various Lactobacillus species, help restore the balance of bacteria in your gut. The strongest evidence is for antibiotic-associated diarrhea. In a large randomized trial, only 9% of people taking a multi-strain probiotic developed diarrhea while on antibiotics, compared to 25% of those taking a placebo. Among people who did develop diarrhea, the probiotic group recovered about a day faster on average (2.6 days versus 3.7 days), and nearly 70% of them were better within two days.
If your diarrhea was triggered by antibiotics, starting a probiotic alongside your course (taken a couple hours apart from the antibiotic) is well supported. For viral stomach bugs, the evidence is more modest but still suggests a shorter illness. Look for products containing Saccharomyces boulardii or Lactobacillus-based blends with at least several billion colony-forming units per dose.
Herbal Options Worth Trying
Chamomile has a long history as a gut soother, and there’s some clinical evidence to back it up. In a trial of patients with diarrhea-predominant irritable bowel syndrome, chamomile extract taken daily for four weeks reduced the average number of daily bowel movements from 3.4 to 1.3. Even more striking, 95% of participants who started with watery stools had normal stool consistency by the end of the trial. Chamomile appears to work by relaxing intestinal spasms and reducing inflammation in the gut lining.
Ginger tea is another traditional option that can help settle nausea and cramping. Neither chamomile nor ginger will stop acute infectious diarrhea the way loperamide does, but they can make you more comfortable while your body fights off the infection.
Warning Signs That Need Medical Attention
Most diarrhea resolves without any medical intervention, but certain symptoms mean something more serious is going on. For adults, these include: diarrhea lasting more than two days with no improvement, signs of dehydration (excessive thirst, very dark urine, dizziness, little or no urination), severe abdominal or rectal pain, bloody or black stools, and fever.
For children, the timeline is tighter. A child whose diarrhea hasn’t improved in 24 hours, who hasn’t had a wet diaper in three or more hours, who has a fever above 102°F, or who seems unusually sleepy or unresponsive needs prompt medical evaluation. Sunken eyes, a dry tongue, or crying without tears are signs of significant dehydration in kids and shouldn’t wait.
Putting It All Together
The fastest path through a bout of diarrhea combines three things: aggressive fluid and electrolyte replacement, a temporary shift to bland low-fiber foods, and optional use of loperamide or bismuth subsalicylate to reduce symptoms while your gut heals. Adding a probiotic is especially useful if antibiotics triggered the problem. Most people feel noticeably better within 24 to 48 hours and are back to normal eating within three to five days.