Traveler's Diarrhea · Mexico
Montezuma's revenge: do you need antibiotics for Mexico?
For most people, no antibiotic up front, but a standby one is smart. Montezuma's revenge (also called turista) is just traveler's diarrhea, the most common illness Americans pick up in Mexico. Most cases are mild and clear with fluids and rest. The plan that works is to carry a standby antibiotic like azithromycin and use it only if you get a moderate to severe case, alongside loperamide (Imodium) and rehydration salts for comfort.
What Montezuma's revenge actually is
The nickname sounds dramatic, but it is the same food and water-borne infection travelers get all over the world (Delhi belly in India, Bali belly in Indonesia). In Mexico it usually comes from tap water, ice, raw or unpeeled produce, or food that has been sitting out. It is most often bacterial, which is why an antibiotic helps the worse cases.
I have had traveler's diarrhea more than once, in Mexico, in Guatemala, and in Southeast Asia. It is the single most common thing that goes wrong on a trip, and it is miserable when you are far from a pharmacy and do not speak the language. That is why I carry a standby antibiotic, and why I built this: I have been the traveler stuck in a hotel bathroom wishing I had packed one before I left.
Bidwell Cranage, Bidwell Health founder, trekking in Guatemala. One of 26 countries traveled.
When you treat with fluids, and when you reach for the antibiotic
| How bad it is | What to do |
|---|---|
| Mild (annoying, not stopping your day) | Fluids and rehydration salts, rest, loperamide for comfort. No antibiotic. |
| Moderate to severe (ruining your trip) | A standby course of azithromycin can shorten it. This is the reason to carry one. |
| Blood in the stool, high fever, severe dehydration | Seek in-person care. Do not just push fluids and an antibiotic, these need a clinician. |
Oral rehydration is the single most important treatment. Loperamide eases symptoms but should not be used alone if you have a fever or bloody stool. The point of the standby antibiotic is that a pharmacy run while you are sick in Cancun or Mexico City is the last thing you want, so you carry it from home just in case.
How to avoid it in the first place
- Drink sealed bottled or purified water; skip tap water and ice
- Be careful with raw produce, unpeeled fruit, and buffet food left sitting out
- Boil it, cook it, peel it, or forget it
- Wash hands often or use sanitizer before eating
- Remember an all-inclusive resort does not make you immune
Bismuth subsalicylate (Pepto-Bismol) taken preventively can lower your risk somewhat, but most travelers just focus on safe food and water and carry a standby antibiotic as backup.
Get a standby antibiotic before Mexico
Bidwell Health can review you and send a standby antibiotic online to your pharmacy before you fly, when it is clinically appropriate.
A $45 asynchronous visit (no video, no membership), reviewed by a licensed nurse practitioner, for adults located in one of our eligible states. Request it before you leave, since you need to be in an eligible state when you ask for care and you want the medication in hand before the trip.
FAQ
Is Montezuma's revenge just traveler's diarrhea?
Yes. Montezuma's revenge, sometimes called turista, is the nickname for traveler's diarrhea in Mexico. It is usually a food or water-borne infection, most often bacterial, that causes diarrhea and cramps for a day or a few days. Most cases are mild and get better with fluids and rest.
Do I need antibiotics for Mexico?
Not for prevention, and not for a mild case. Most travelers do well carrying a standby antibiotic like azithromycin to use only if they get moderate to severe diarrhea on the trip, plus loperamide and rehydration salts for comfort. You take the antibiotic if symptoms are bad, not the day you arrive.
How do I avoid getting sick in Mexico?
Drink sealed bottled or purified water, skip ice and tap water, and be careful with raw produce, unpeeled fruit, and food that has been sitting out. The old rule still helps: boil it, cook it, peel it, or forget it. Good hand hygiene matters, and an all-inclusive resort does not make you immune.
Can I get a traveler's diarrhea antibiotic for Mexico online?
Yes. Bidwell Health offers a $45 asynchronous online visit, no video and no subscription, for adults located in one of our eligible states. A licensed nurse practitioner can send a standby antibiotic to your pharmacy before you fly, when it is clinically appropriate, so you have it just in case.
Related
- Traveler's diarrhea antibiotics online, $45 visit
- Traveler's diarrhea vs food poisoning
- How fast does azithromycin work?
Last reviewed: June 18, 2026 · References: CDC Yellow Book (Travelers' Diarrhea).