Travelers’ Diarrhea: Prevention, Treatment and the Antibiotic Question

The pharmacist in the airport concourse has seen this scene a hundred times: a traveler with a boarding pass in one hand and a phone in the other, scrolling a video that insists every suitcase needs a “just in case” course of antibiotics. As of June 2026, that advice is everywhere, pushed by the start of the summer travel season and a wave of short clips promising a pill that makes stomach trouble abroad impossible.

The evidence tells a more interesting story. Travelers’ diarrhea remains the most common illness among international visitors to Asia, Africa and Latin America, and the medicines that treat it have not changed much. What has changed is how carefully guideline writers now ration them. The current CDC Yellow Book, the agency’s reference for travel medicine, sorts cases by how much they disrupt your day and asks travelers to save antibiotics for the illnesses that genuinely need them.

This piece walks through what actually works, what the studies can and cannot support, and how to decide, with your clinician, whether an antibiotic belongs in your bag.

What changed recently in travelers diarrhea advice

For decades the reflex was simple: diarrhea abroad meant an antibiotic, often a fluoroquinolone such as ciprofloxacin, started at the first loose stool. Two shifts have rewritten that script.

The first was a change in how severity is defined. In 2017 the International Society of Travel Medicine replaced stool-counting with functional categories: mild illness is tolerable and does not change your plans, moderate illness is distressing or forces you to alter them, and severe illness is incapacitating or involves dysentery, meaning diarrhea with visible blood. The CDC adopted that framework in its Yellow Book and has kept it through the 2024 edition (published May 2023) and the 2026 edition, which continues to advise against antibiotics for mild cases and positions azithromycin as the preferred agent when one is needed.

The second shift is the resistance picture. Surveillance across Southeast Asia shows that Campylobacter, a common bacterial cause, is now frequently resistant to fluoroquinolones, which is why CDC guidance steers away from them for that region. Observational studies have also found that a large share of travelers returning from South Asia carry extended-spectrum beta-lactamase (ESBL) producing bacteria, gut germs that resist many standard antibiotics, and that taking an antibiotic during the trip raises that risk further. These are cohort data, not randomized trials, but the signal is consistent across countries.

What has not changed is the toolkit. Oral rehydration solution, loperamide, bismuth subsalicylate and a short antibiotic course for the right patient remain the evidence-based options. The news, in short, is about restraint rather than any new product.

What is travelers diarrhea, and how is it different from regular diarrhea?

Travelers’ diarrhea is defined by circumstance as much as by biology. Clinicians use the term for three or more loose stools in 24 hours, accompanied by at least one other symptom such as cramping, nausea, fever or urgency, in someone who is traveling or has recently returned from a region with less reliable sanitation. The same loose stools at home might be a virus, a food intolerance or a medicine side effect; abroad, the odds shift sharply toward a bacterial infection picked up from food or water.

That shift is the practical difference. In high-income countries most short bouts of diarrhea are viral and self-limiting. Among travelers to high-risk destinations, bacteria account for an estimated 80 to 90 percent of cases, which is why the treatment conversation includes antibiotics at all.

How common is it? The CDC puts the attack rate at roughly 30 to 70 percent of travelers over a two-week stay, depending on destination and season. South and Southeast Asia, most of Africa, and parts of Central and South America carry the highest risk; southern Europe, parts of the Caribbean and the Middle East sit in the middle; North America, Western Europe, Australia and Japan are low risk.

Personal factors matter too. Younger adults are affected more often than older travelers, possibly because they eat more adventurously. People taking acid-suppressing medicines lose some of the stomach’s natural defense, since stomach acid kills many swallowed bacteria. Those with inflammatory bowel disease, diabetes or weakened immunity face a higher chance of a severe course, and infants and pregnant travelers dehydrate faster. Knowing where you fall on that spectrum shapes every decision that follows.

What causes travelers diarrhea, and why timing tells you a lot

The single most common culprit is enterotoxigenic Escherichia coli, or ETEC, a strain of E. coli that produces toxins which pull water into the bowel. It is joined by Campylobacter, Shigella, Salmonella and, in some regions, other E. coli types. Viruses such as norovirus and rotavirus cause a smaller share, and parasites including Giardia, Cryptosporidium and Entamoeba make up a few percent of cases but a much larger share of illnesses that drag on for weeks.

Each group has a characteristic clock. Bacterial and viral illness typically begins 6 to 72 hours after the contaminated meal, often abruptly, with cramps and watery stools. Parasitic infection tends to incubate for one to two weeks and then produces a slower, grumbling pattern of bloating, gas and soft stools that can outlast the trip itself. If symptoms start on day two of a holiday, a bacterium or virus is the likely explanation; if they start a week after you get home, a parasite moves up the list.

Untreated, bacterial travelers’ diarrhea usually lasts three to five days. Viral illness often resolves in two to three. Fever, blood in the stool or many watery stools a day point toward the more invasive bacteria, particularly Shigella and Campylobacter, and those are the cases where antibiotics earn their place.

Where do the germs come from? Mostly from food handled with unwashed hands, undercooked meat, raw seafood, unpasteurized dairy, unpeeled produce rinsed in tap water, and ice made from that same water. Restaurant hygiene is often a bigger factor than cuisine, which is one reason a cautious menu does not guarantee protection, as the next sections explain.

Is travelers diarrhea contagious?

Yes, in the sense that matters: the organisms behind it spread from person to person by the fecal-oral route, meaning microscopic traces of stool reach someone else’s mouth via hands, surfaces or food. The label “travelers’ diarrhea” describes how you caught it, not a separate germ, so a traveler with Shigella can pass Shigella to a roommate or a child at home exactly as a non-traveler could.

How easily depends on the pathogen. Norovirus is notoriously transmissible; a few viral particles are enough to infect, and cruise-ship outbreaks are the classic illustration. Shigella also needs only a small infectious dose. ETEC and Salmonella generally require more organisms to cause illness, which makes casual household spread less common but far from impossible. Parasites such as Giardia form hardy cysts that survive on surfaces and in water.

The practical response is the same regardless of the bug. Wash hands with soap and water after every bathroom visit and before preparing or eating food; alcohol-based sanitizer is a reasonable backup when soap is unavailable, though it is less effective against norovirus and Cryptosporidium. Avoid preparing meals for others while symptoms last and, following NHS advice, for 48 hours after the last episode of diarrhea or vomiting. Clean bathrooms with a disinfectant and launder soiled items on a hot cycle.

Children, older adults and anyone with a weakened immune system in the household deserve extra care, because the same infection that is a nuisance for a healthy adult can lead to dehydration or a more severe course for them. If someone you live with develops bloody diarrhea or fever after your return, their clinician should know about your recent travel.

How to prevent travelers diarrhea: food and water, with an honest caveat

“Boil it, cook it, peel it, or forget it” is the slogan every travel clinic repeats, and it is biologically sound. Heat above about 70°C (158°F) kills the relevant bacteria and viruses, intact peel is a physical barrier, and sealed bottled or properly treated water bypasses contaminated supplies.

Here is the uncomfortable part. Observational studies have repeatedly found that travelers who report following these rules get sick at rates similar to those who do not. The likeliest explanation is not that the advice is wrong but that compliance is nearly impossible to sustain, and that a great deal of contamination happens in the kitchen, on cutting boards and in the hands of food handlers, well before a dish reaches your table. The CDC says as much: food and water precautions reduce risk but do not eliminate it.

So apply the rules where they give the best return.

• Choose food that is cooked through and served steaming hot; heat is the one step you can see.
• Prefer fruit you peel yourself, and skip salads and garnishes rinsed in local water.
• Drink sealed bottled, boiled or filtered-and-disinfected water, and treat ice as untreated water unless you know its source.
• Be cautious with raw or undercooked shellfish, unpasteurized dairy and juices, and buffet food that has sat at room temperature.
• Busy restaurants with high turnover are generally safer than quiet ones, because food is fresher.

None of this calls for anxiety at every meal. It calls for a few consistent habits and a plan for what to do when, despite them, the bug wins.

Hand hygiene, bismuth subsalicylate and probiotics: what else lowers the risk?

Hand washing is the quiet workhorse of prevention. Soap and running water for 20 seconds before eating and after the bathroom removes the organisms that food precautions miss. The supporting evidence comes largely from studies of diarrheal disease in low-resource settings rather than trials in tourists, but the mechanism is direct and the cost of the habit is nothing.

Bismuth subsalicylate, the active ingredient in some pink stomach remedies, is the best-studied non-antibiotic preventive. Randomized trials in travelers found that taking it regularly throughout a trip reduced the incidence of diarrhea by roughly half. The CDC lists it as an option for healthy adults on shorter trips. It has real drawbacks: it blackens the tongue and stool (harmless but alarming), can cause ringing in the ears, and is not suitable for people who are allergic to aspirin, who take blood thinners or certain other medicines, who are pregnant, or for children, because of the small risk of Reye syndrome, a rare but serious condition in young people exposed to salicylates during viral illness. Whether it fits your trip and your medicine list is a question for your clinician or pharmacist.

Probiotics are heavily marketed for travel and the appeal is obvious. The evidence is not. Trials have used different strains, different durations and different definitions of diarrhea, and pooled results show at best a modest, inconsistent benefit. The NIH Office of Dietary Supplements summarizes the overall probiotic literature as promising in some conditions but limited by study quality, and that verdict applies squarely here. Probiotics are generally safe for healthy adults, so trying one is reasonable, but it should not displace the measures with stronger support.

Is there a travelers diarrhea vaccine?

Not for the main culprit. No vaccine against ETEC, the leading cause, is licensed in the United States, and candidates remain in clinical development. What exists are vaccines against two specific bacterial infections that can travel in the same contaminated food and water.

The oral cholera vaccine Vaxchora is approved in the United States for people aged 2 through 64 who are traveling to an area with active cholera transmission, which the CDC defines narrowly; most tourists never visit such an area, and the CDC does not recommend the vaccine for general travelers’ diarrhea prevention. Cholera itself causes profuse, watery diarrhea that can dehydrate a person within hours, and the WHO stresses that safe water and sanitation remain the primary defense even where vaccination campaigns run.

Typhoid vaccine, available as an injection or an oral capsule series, is recommended by the CDC for most travelers to South Asia and many other destinations where typhoid fever is common, and by the NHS for similar trips. Typhoid is a systemic illness with prolonged fever rather than classic diarrhea, so the vaccine protects against a different, more dangerous problem rather than reducing everyday stomach upset. Protection is partial, and food and water care still matter.

In the United Kingdom and several other countries, a different oral cholera vaccine, Dukoral, is used; the NHS notes it is generally only recommended for travelers at particular risk, such as aid workers in outbreak settings. Some older trials suggested limited cross-protection against ETEC, but the effect was short-lived and modest, and the NHS does not recommend it for routine traveler’s diarrhea prevention.

The bottom line: vaccines protect against specific serious infections for eligible travelers; they are not a shield against the common, self-limiting illness this article is about. Your travel clinic can match your itinerary to current CDC or NHS eligibility.

Should you take antibiotics to prevent travelers diarrhea?

For most travelers, no, and the reasons are worth understanding rather than simply accepting.

Preventive antibiotics do work in the narrow sense. Randomized trials of rifaximin, a poorly absorbed antibiotic that stays mostly in the gut, show it prevents a substantial proportion of travelers’ diarrhea episodes in regions where non-invasive E. coli dominates. Older trials of fluoroquinolones showed similar efficacy. If the only question were “does the pill reduce loose stools during a two-week trip,” the answer would be yes.

The CDC nevertheless advises against routine prophylaxis, and the current Yellow Book reserves it for a small group: short-term travelers at high risk of complications, such as people with significant immunosuppression, serious chronic illness or a history of severe infection, or those whose trip is so critical that even a day of illness is unacceptable. For everyone else the trade-offs tip the other way. Taking any antibiotic disturbs the resident gut bacteria, increases the chance of acquiring resistant organisms and carrying them home, and exposes the traveler to side effects for an illness that usually resolves in a few days. Rifaximin is also poorly active against Campylobacter and Shigella, the invasive bacteria that cause the worst illness, so a traveler on prophylaxis can be lulled into ignoring exactly the symptoms that need attention.

Bismuth subsalicylate occupies the middle ground for healthy adults who want pharmacological prevention without an antibiotic, as described earlier.

If you believe you fall into the high-risk group, raise it at a pre-travel consultation. The decision to prescribe prophylaxis, and the choice of agent, belongs to the clinician who knows your medical history and your itinerary.

How to get rid of travelers diarrhea: the first 24 hours

Most episodes are managed entirely by the traveler, and the first priority is water and salt, not killing germs. Diarrhea drains both, and the danger in otherwise healthy adults is dehydration rather than the infection itself.

Oral rehydration solution (ORS) is the evidence-based answer. It is a precisely balanced mix of glucose and electrolytes that uses a transport mechanism in the small intestine to pull water into the body even while the gut is secreting it. Pre-measured packets are sold in pharmacies worldwide and should be mixed only with safe water, following the volume printed on the packet. For a mild case in a healthy adult, a mix of sealed bottled water, diluted juice, broth and salty snacks is usually adequate; ORS becomes important when stools are frequent, when there is vomiting, in children and older adults, and in hot climates. Sports drinks are better than nothing but contain too much sugar and too little salt to count as true rehydration.

Eat when you can. The old advice to starve the gut has been abandoned; bland, easily digested food helps the intestinal lining recover. Avoid alcohol and, for a few days, large amounts of dairy, since the infection temporarily reduces the enzyme that digests lactose.

Loperamide, an over-the-counter medicine that slows intestinal movement, reliably cuts the number of stools and is the CDC’s suggested option for mild and moderate illness in adults, used according to the package label. It should not be used by anyone with fever or bloody stools without medical advice, because slowing the gut can prolong an invasive infection, and it is not recommended for young children.

Give it a day or two. If the pattern is watery stools without fever or blood, and you are drinking adequately, the odds strongly favor steady improvement.

Travelers diarrhea treatment options according to the CDC, by severity

The CDC’s approach is deliberately matched to how much the illness disrupts you, not to a stool count. The table summarizes the current Yellow Book framework for adults; children, pregnant travelers and people with chronic illness need individual advice.

Severity (CDC definition)	What it looks like	Recommended approach	Role of antibiotics
Mild	Tolerable, not distressing, does not interfere with planned activities	Fluids or ORS; loperamide or bismuth subsalicylate may be used for comfort	Not recommended
Moderate	Distressing or forces a change in plans	Fluids or ORS; loperamide alone or alongside an antibiotic	May be used; azithromycin preferred, fluoroquinolone or rifaximin in some settings
Severe	Incapacitating, or any bloody diarrhea (dysentery)	Fluids or ORS; antibiotic; loperamide only as an adjunct and never alone if dysentery or fever present	Recommended; azithromycin preferred
Persistent (14 days or more)	Ongoing symptoms, often after return	Medical evaluation with stool testing	Depends on the organism found

Three features of this scheme deserve emphasis. Azithromycin is preferred for severe illness and for Southeast Asia because it covers Campylobacter, which is often fluoroquinolone-resistant there. Rifaximin is an option for watery, non-invasive diarrhea but not for dysentery or fever, because it does not reach the invasive bacteria. And combining loperamide with an antibiotic in moderate to severe watery diarrhea shortens the illness more than either alone, according to several randomized trials, provided there is no blood or high fever.

Many travel clinics prescribe a standby antibiotic before departure with written instructions on when to start it. The decision to carry one, which agent, and how to take it rest with the prescribing clinician, who will weigh your destination, your medicines and your health.

The antibiotic question: when do they help, and what do they cost your gut?

Antibiotics shorten travelers’ diarrhea. That much is settled by randomized, placebo-controlled trials dating back decades: treated illness typically lasts about a day to a day and a half, compared with three to five days untreated. For someone with dysentery, high fever or a dozen stools a day, that difference is substantial and the benefit clearly outweighs the risk.

For mild illness the math flips. Shaving a day off a tolerable nuisance brings the same downsides as any antibiotic course: nausea, yeast infections, rare but serious allergic or cardiac effects with some agents, and, with fluoroquinolones, tendon and nerve problems that led regulators to restrict their use for minor infections. Then there is the resistance cost. Cohort studies from several European countries have found that between a third and three quarters of travelers returning from South Asia carry ESBL-producing Enterobacteriaceae in their gut, with the highest rates among those who took an antibiotic during the trip. Most carriers clear the organisms within months and never fall ill, but some go on to have resistant urinary or bloodstream infections, and carriers can pass the bacteria to household members. These are observational data and cannot prove that the antibiotic caused the acquisition, yet the dose-response pattern and biological plausibility are strong enough that guideline writers treat the risk as real.

So the honest framing is not “antibiotics good” or “antibiotics bad.” It is a threshold. Below it, hydration and loperamide carry the day. Above it, a short course started promptly is appropriate medicine. The CDC’s severity categories exist to mark that threshold in plain language, and a standby prescription discussed before travel lets you act on it without guesswork. Any self-directed change, including stopping a course early because you feel better, should be run past the clinician who prescribed it.

What the evidence actually says, graded

Travel medicine mixes robust trial data with a surprising amount of expert consensus. Sorting the two prevents false confidence in either direction.

Strong evidence, multiple randomized trials. Antibiotics shorten moderate to severe bacterial travelers’ diarrhea. Adding loperamide to an antibiotic in non-dysenteric illness shortens it further. Oral rehydration solution reduces dehydration and the need for intravenous fluids across all ages; the WHO credits it with saving millions of children’s lives worldwide. Bismuth subsalicylate taken preventively reduces incidence by about half in healthy adults. Rifaximin prophylaxis prevents a large share of episodes in ETEC-dominant regions.

Moderate evidence, trials with limitations or consistent observational data. Azithromycin’s superiority over fluoroquinolones in Southeast Asia rests on resistance surveillance plus comparative trials in Thailand showing better outcomes for Campylobacter. The link between antibiotic use abroad and ESBL carriage comes from prospective cohort studies with stool samples before and after travel; the association is consistent, but no one has randomized travelers to antibiotics to test it.

Weak or mixed evidence. Probiotics show small, inconsistent benefits across heterogeneous trials. Food and water precautions have an unassailable mechanism but observational studies find little difference in attack rates between careful and careless eaters, most likely because of compliance and kitchen-level contamination.

Expert opinion. The exact severity thresholds, the advice to prefer busy restaurants, and the guidance on when to use loperamide alone versus with an antibiotic are judgment calls informed by biology and experience rather than head-to-head trials.

The pattern is instructive: the interventions with the strongest evidence are the unglamorous ones, rehydration and judicious antibiotics, while the products most heavily marketed sit at the weak end of the scale.

Common myths about travelers diarrhea, corrected

“Pack antibiotics and take them at the first loose stool.” This is the viral claim driving current searches, and it inverts the guidance. The CDC advises no antibiotics for mild illness and reserves them for moderate to severe cases, ideally under a plan agreed with a clinician before departure. Starting one for every episode trades a day of discomfort for side effects and a measurable rise in resistant gut bacteria.

“If you stick to bottled water you cannot get sick.” Water is one route among several. Salads, ice, undercooked food and a cook’s unwashed hands account for a large share of infections. Bottled water helps; it does not immunize you.

“A probiotic before the trip builds a protective gut.” The trials are small, strain-specific and inconsistent. A probiotic may offer a modest benefit and is unlikely to harm a healthy adult, but it is not a substitute for hand hygiene or a plan for rehydration.

“Loperamide traps the infection inside you.” For watery diarrhea without fever or blood, trials show loperamide is safe and effective, and combining it with an antibiotic speeds recovery. The caution applies to dysentery and high fever, where it should not be used alone.

“Starve a stomach bug.” Fasting delays recovery of the intestinal lining. Eat bland food as tolerated and keep drinking.

“Locals are immune, so street food is safe if they eat it.” Residents develop partial immunity to local strains through repeated exposure; visitors have none. The same stall can be perfectly fine for one group and risky for the other.

“Once home, you are in the clear.” Parasitic infections can surface a week or two after return, and a minority of travelers develop post-infectious irritable bowel symptoms lasting months. Persistent symptoms deserve evaluation, not patience alone.

When to see a doctor about travelers diarrhea

Most travelers never need a clinic. The following signs, drawn from CDC, Mayo Clinic and NHS guidance, mark the point where self-management stops and medical care begins. Seek care promptly, locally if you are still abroad, if you have:

• Blood or mucus in the stool, or stools that are black and tarry (and you have not taken bismuth subsalicylate).
• Fever of 38.5°C (101.3°F) or higher, or any fever with shaking chills.
• Severe abdominal pain, or pain that localizes to one area.
• Signs of dehydration: little or no urine for eight hours or more, dizziness on standing, a racing heart, extreme thirst, dry mouth, or confusion.
• Vomiting that prevents you keeping fluids down for more than a few hours.
• Six or more unformed stools in 24 hours, or diarrhea that is not improving after 48 hours of treatment.
• Symptoms lasting more than 14 days, or returning after you thought they had settled.

Lower the threshold for infants, children, pregnant travelers, adults over about 65, and anyone with diabetes, kidney disease, heart failure, inflammatory bowel disease or a weakened immune system; in these groups dehydration arrives faster and infections run harder. A child who is unusually drowsy, has sunken eyes, cries without tears or has a dry diaper for several hours needs same-day care.

After you get home, tell any clinician you see about recent travel, even for an unrelated complaint, and mention any antibiotic you took abroad. Persistent diarrhea usually calls for stool testing to look for parasites such as Giardia, and treatment then depends on what is found. If you are on a prescribed medicine, including a standby antibiotic, do not stop or change it on your own; the prescribing clinician can adjust it once they know what is happening. Travel insurance documents and a note of the medicines you carry make that conversation faster wherever you are.

Frequently asked questions

How to get rid of travelers diarrhea fast?

Start with fluids and salt, ideally oral rehydration solution mixed with safe water, and for adults without fever or bloody stools, loperamide according to the package label. Most bacterial cases settle within three to five days on this alone. If the illness is distressing enough to change your plans, a clinician may prescribe a short antibiotic course, which shortens symptoms to roughly a day; the choice of agent belongs to them.

What is the difference between travelers diarrhea and regular diarrhea?

The symptoms overlap, but the cause and setting differ. Travelers’ diarrhea means three or more loose stools in 24 hours plus another symptom during or shortly after a trip to a region with less reliable sanitation, and it is bacterial in an estimated 80 to 90 percent of cases. Short diarrhea at home is more often viral, which is why antibiotics are rarely discussed for it.

What are the treatment options for travelers diarrhea according to the CDC?

The CDC Yellow Book matches treatment to severity. Mild illness: fluids or oral rehydration solution, with loperamide or bismuth subsalicylate optional. Moderate illness: fluids plus loperamide, with or without an antibiotic. Severe illness or any bloody diarrhea: fluids plus an antibiotic, with azithromycin preferred; loperamide only as an add-on and never alone with fever or blood. Symptoms lasting 14 days or more need medical evaluation.

Is travelers diarrhea contagious to family at home?

It can be. The bacteria, viruses and parasites that cause it spread by the fecal-oral route, and norovirus and Shigella need only tiny amounts to infect. Wash hands with soap after every bathroom visit, avoid preparing food for others until 48 hours after your last episode, and disinfect bathrooms. Household members who develop fever or bloody diarrhea should tell their clinician about your recent travel.

What are the first travelers diarrhea symptoms to watch for?

Bacterial and viral illness usually begins abruptly 6 to 72 hours after a contaminated meal, with cramps, urgency and watery stools, sometimes nausea or low-grade fever. Parasitic infections start more slowly, one to two weeks after exposure, with bloating, gas and soft stools. Blood in the stool, high fever or severe pain signal a more invasive infection that warrants medical attention rather than self-management.

How to prevent travelers diarrhea without antibiotics?

Wash hands with soap before eating and after the bathroom, eat food that is cooked through and served hot, peel fruit yourself, and drink sealed bottled, boiled or properly treated water, treating ice the same way. For healthy adults on shorter trips, bismuth subsalicylate taken throughout the journey roughly halved diarrhea rates in trials; ask a clinician or pharmacist whether it fits your medicines and health conditions.

Should I take ciprofloxacin or azithromycin for travelers diarrhea?

That decision belongs to the clinician who prescribes it, and the destination matters. The CDC prefers azithromycin for severe illness and for travel to Southeast Asia, where Campylobacter is frequently resistant to fluoroquinolones such as ciprofloxacin. Fluoroquinolones also carry warnings about tendon and nerve effects. Neither is recommended for mild illness, which is managed with fluids and, for adults, loperamide.

Is there a vaccine for travelers diarrhea?

Not for the main cause. No vaccine against enterotoxigenic E. coli is licensed in the United States. The oral cholera vaccine Vaxchora is approved for travelers aged 2 through 64 going to areas with active cholera transmission, and typhoid vaccine is recommended for many destinations, but both protect against specific serious infections rather than everyday travelers’ diarrhea. A travel clinic can match CDC or NHS eligibility to your itinerary.

Can I take loperamide with an antibiotic for travelers diarrhea?

For watery diarrhea without fever or blood, randomized trials show that loperamide combined with an antibiotic shortens illness more than either alone, and the CDC includes this option for moderate and severe cases. Loperamide should not be used alone when there is dysentery or high fever, and it is not recommended for young children. Follow the package label and the instructions of the prescribing clinician.

How long does travelers diarrhea last, and when is it a problem?

Untreated bacterial illness typically lasts three to five days; viral illness two to three; antibiotic-treated moderate to severe cases about a day to a day and a half. Symptoms persisting beyond 14 days, or appearing a week or more after you return, raise the likelihood of a parasite and call for stool testing. A minority of travelers develop post-infectious irritable bowel symptoms that can linger for months.

References

• CDC Yellow Book: Travelers' Diarrhea
• NHS: Diarrhoea and vomiting
• MedlinePlus: Traveler's Health

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.