The most important thing to buy for diarrhea is an oral rehydration solution, not an anti-diarrheal pill. Fluid and electrolyte loss causes most of the danger and misery associated with diarrhea, so rehydration products should be at the top of your list. Beyond that, a few targeted over-the-counter medications, gentle foods, and comfort items can shorten the episode and keep you functional while your gut recovers.
Oral Rehydration Products
Diarrhea pulls water and essential salts out of your body fast. Plain water replaces the fluid but not the sodium, potassium, and glucose your cells need to actually absorb that fluid. That’s why an oral rehydration solution (ORS) works better than water alone. Products like Pedialyte, DripDrop, and generic ORS packets are formulated with the right balance of sugar and electrolytes to maximize absorption in your gut.
Sports drinks like Gatorade are a common reach, but they’re designed for sweat loss during exercise, not illness. They tend to be higher in sugar and lower in electrolytes than what your body needs during diarrhea. High sugar content can actually pull more water into the intestines and make loose stools worse. If a sports drink is all you have, it’s better than nothing, but an oral rehydration solution is the better buy. For children, Pedialyte or a similar pediatric ORS is the clear choice.
Buy enough to sip steadily throughout the day. Small, frequent sips are easier to keep down than large gulps, especially if nausea is part of the picture.
Anti-Diarrheal Medications
Two over-the-counter options dominate the pharmacy shelf: loperamide (sold as Imodium) and bismuth subsalicylate (sold as Pepto-Bismol). They work differently and suit different situations.
Loperamide slows down the muscle contractions in your intestines, giving your body more time to absorb water from stool. It works faster than bismuth subsalicylate and is the stronger option when you need to get through a workday or a flight. The standard adult dose is two caplets (4 mg) up front, then one caplet (2 mg) after each loose stool, with a maximum of eight caplets (16 mg) in 24 hours. Don’t exceed that limit. For children aged 6 to 12, dosing is based on weight and age, and children under 6 should not take it at all without a doctor’s guidance.
Bismuth subsalicylate is milder. It coats the lining of the stomach and intestines and has some antibacterial properties, which makes it a reasonable pick for traveler’s diarrhea or an upset stomach with nausea. It can turn your tongue and stool black temporarily, which is harmless but startling if you aren’t expecting it.
When Not to Use Anti-Diarrheals
Skip loperamide if you have blood in your stool along with a high fever, as these can be signs of a bacterial infection that your body needs to clear rather than trap. You should also avoid it if you’ve developed severe diarrhea after taking antibiotics, since that pattern can signal a dangerous gut infection where slowing the bowel down makes things worse. If you have inflammatory bowel disease and are in the middle of a flare-up, loperamide is not appropriate either.
Probiotics
Probiotics won’t stop diarrhea the way loperamide does, but they can shorten how long it lasts and reduce the chance of it happening in the first place. A large meta-analysis published in The Lancet Infectious Diseases found that probiotics reduced antibiotic-associated diarrhea risk by 52% and acute diarrhea from various causes by 34%. In children, the protective effect was even stronger, at 57%.
The strains with the most research behind them are Saccharomyces boulardii (a beneficial yeast) and Lactobacillus rhamnosus GG. Both are widely available as capsules or powders. Look for one of these specific strains on the label rather than grabbing a generic “probiotic blend.” You can take them alongside anti-diarrheal medication. They’re especially worth buying if your diarrhea was triggered by a course of antibiotics.
Food and Drinks to Stock Up On
You may have heard of the BRAT diet: bananas, rice, applesauce, and toast. It used to be the standard advice, but medical guidelines have moved away from it. The American Academy of Pediatrics no longer recommends a strict BRAT diet for children because it’s too low in protein, calcium, vitamin B12, and fiber. Following it for more than 24 hours can actually slow recovery by starving your gut of the nutrients it needs to heal.
A better approach is to eat bland, soft foods as tolerated and return to a normal diet as soon as you can. Good items to have on hand include white rice, plain crackers, broth-based soups, boiled potatoes, plain chicken, and bananas. Avoid greasy, spicy, or high-fiber foods until stools firm up. Dairy bothers some people during a gut illness, so you may want to hold off on milk for a day or two, though yogurt with live cultures is generally fine and provides some probiotic benefit.
The key principle is to eat when you feel able to. Your body needs fuel to recover, and restricting yourself to four bland foods for days on end does more harm than good.
Skin Care Supplies
Frequent wiping takes a real toll on the skin around your anus. This is the part of dealing with diarrhea that people rarely think to prepare for, and it can become genuinely painful within a day. A few inexpensive purchases make a big difference.
Pick up a zinc oxide barrier cream, such as Sudocrem or a standard diaper rash cream. Apply a thin layer after each bowel movement to protect irritated skin from further contact with stool. For wiping, soft or moist toilet paper is gentler than standard dry paper. If you use wet wipes, choose unscented ones without alcohol, as scented wipes and standard baby wipes can sting broken skin. Even better, rinse with warm water using a handheld shower head or a peri bottle (a squeeze bottle originally designed for postpartum care) and then pat dry gently. Avoid soap with fragrance, antiseptics, or disinfectants on irritated skin. Plain warm water is all you need.
For Children: Zinc Supplements
The World Health Organization recommends zinc supplementation for children with diarrhea: 20 mg per day for 10 to 14 days, or 10 mg per day for infants under six months. Zinc helps the intestinal lining repair itself and can reduce both the severity and duration of the episode. Zinc syrup or dissolvable tablets formulated for children are available at most pharmacies. This recommendation applies primarily to children, not adults.
Signs You Need More Than the Pharmacy
Most diarrhea resolves on its own within a few days with fluids and rest. But certain symptoms mean your body is losing the battle with dehydration and you need medical help, not another trip to the store. Watch for a rapid pulse paired with low blood pressure, dizziness or fainting, no urination for eight or more hours, or a dry mouth that doesn’t improve with drinking. In infants, fewer than six wet diapers a day is a warning sign. Bloody stool with a high fever also warrants prompt medical attention, as it may indicate a bacterial infection that needs targeted treatment rather than over-the-counter products.