The fastest way to calm diarrhea with a drink is an oral rehydration solution, either store-bought (like Pedialyte) or homemade with water, salt, and sugar. But stopping diarrhea isn’t just about one magic beverage. It’s about choosing the right fluids, avoiding the wrong ones, and replacing what your body is losing before dehydration sets in.
Oral Rehydration Solutions Work Best
Oral rehydration solutions (ORS) are the single most effective drink for diarrhea. They contain a precise balance of sodium, sugar, and water designed to maximize fluid absorption in your gut. The sugar isn’t just for taste. Glucose activates a transport system in your intestinal lining that pulls sodium and water along with it, essentially fast-tracking hydration into your bloodstream even while your gut is irritated.
Commercial options like Pedialyte contain about 45 to 50 milliequivalents of sodium per liter and 25 grams of glucose per liter. These are formulated to match what your body loses during diarrhea, and they work for adults just as well as for children. You can find them at any pharmacy, usually near the baby aisle.
If you can’t get to a store, the World Health Organization’s formula calls for mixing 6 level teaspoons of sugar and half a teaspoon of salt into 1 liter of clean water. This is a simplified version of their clinical formula. Sip it steadily rather than gulping it down, especially if you’re also nauseous. One caution: homemade versions are easy to get wrong, and too much sugar or too little salt can actually make diarrhea worse. Measure carefully.
Teas That Can Ease Symptoms
Several herbal and traditional teas can help settle your gut while keeping you hydrated. They won’t replace lost electrolytes the way an ORS does, but they add variety and may shorten how long symptoms last.
Black tea contains tannins, compounds that have a mild astringent effect on the intestinal lining. A 2016 study in children with diarrhea found that black tea, alongside standard rehydration, improved stool frequency, volume, and consistency. Brew it lightly, since strong black tea can be harsh on an already irritated stomach.
Green tea has a long history as a natural remedy for diarrhea. A 2022 study found that green tea extract significantly improved diarrhea and shortened the duration of illness in children with stomach flu. It also has anti-inflammatory properties that may help calm gut irritation.
Chamomile tea relaxes digestive muscles and can soothe cramping that often accompanies diarrhea. Fennel tea is another traditional option used for a range of digestive complaints including diarrhea. Both are caffeine-free, which matters because caffeine can stimulate your bowels and make things worse.
Drink these teas warm, not hot, and without milk. Add a small pinch of salt to any tea if you’re relying on it as a primary fluid source.
Broth Provides Fluids and Sodium
Clear broth, whether chicken, beef, or bone broth, delivers sodium, small amounts of potassium, and easy-to-absorb calories. It’s gentle on the stomach and feels satisfying in a way that plain water doesn’t when you’re sick. The amino acids in bone broth may also help counteract inflammation, though direct evidence for digestive benefits is still limited.
Broth is especially useful if you can’t stomach the sweetness of an ORS or if you want something savory between rehydration drinks. Store-bought broth works fine. Just check the label and avoid varieties loaded with onion or garlic powder, which can irritate sensitive guts.
Why Sports Drinks Fall Short
Gatorade and similar sports drinks are designed for sweat loss during exercise, not for diarrhea. They have a different electrolyte profile than what your gut needs. Even diluted to half strength, Gatorade only provides about 7 grams of carbohydrates per liter, far less than the glucose needed to activate that sodium-water absorption pathway in your intestines. It’s better than nothing, but it’s not a substitute for a proper ORS.
Full-strength sports drinks also tend to be high in sugar, which creates a separate problem. When too much sugar reaches your intestines without being absorbed, it draws water into your bowel through osmosis, the exact opposite of what you want.
Drinks That Make Diarrhea Worse
Some common choices will actively prolong your symptoms:
- Soda and fruit juice: These are loaded with fructose and high-fructose corn syrup. Fructose is poorly absorbed even in healthy guts, and during diarrhea it’s worse. Unabsorbed fructose causes osmotic diarrhea, pulling water into your colon, and ferments there, producing gas and bloating.
- Coffee and caffeinated drinks: Caffeine stimulates intestinal contractions, speeding up transit time and making stools looser.
- Milk and dairy-based drinks: Diarrhea can temporarily damage the enzyme that breaks down lactose, even if you’re not normally lactose intolerant. Undigested lactose acts the same way as excess fructose, drawing water into your intestines.
- Alcohol: It irritates the gut lining, promotes fluid loss, and disrupts electrolyte balance.
- Plain water in large amounts: Water alone doesn’t replace lost sodium. Drinking only water during heavy diarrhea can dilute your blood sodium to dangerously low levels, a condition called hyponatremia.
A Practical Drinking Schedule
During the first few hours, take small sips of ORS every five to ten minutes rather than drinking a full glass at once. Large volumes can trigger your stomach to empty too quickly, which sends a rush of fluid into already-irritated intestines. Aim for about 200 to 400 milliliters (roughly one to two cups) after each loose stool.
Once you can keep fluids down reliably, alternate between ORS, broth, and tea throughout the day. This gives you a mix of electrolytes, gentle nutrients, and gut-calming compounds. As stools start to firm up, you can gradually reintroduce normal fluids and light foods like plain rice, bananas, and toast.
Signs You’re Getting Dehydrated
Most diarrhea resolves within a day or two with proper fluids. But it can tip into dangerous territory quickly, especially in young children and older adults. Watch for dark yellow or amber urine, which is an early sign you’re falling behind on fluids. Urinating less than usual, dry mouth, dizziness when standing, and unusual fatigue all signal moderate dehydration.
Severe dehydration is a medical emergency. The warning signs include confusion, fainting, no urine output at all, rapid heartbeat, and rapid breathing. If you or someone you’re caring for develops these symptoms, that’s beyond what any drink can fix and requires immediate medical attention.