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Avoid Traveler's Diarrhea

Traveler's diarrhea

Also called Montezuma's revenge, Delhi belly, Food poisoning abroad

3 min plan49 min with every studyUpdated Sep 28, 2026

Who it's forA man aged 18 to 45 whose stomach goes wrong every time he travels.

When to see a doctor
  • Call 911 or the local emergency number abroad now: confusion, blue, gray or blotchy skin, vomiting blood, a sudden severe belly ache, or struggling to breathe.
  • Today: a fever of 100.4°F (38°C) or more, or blood or mucus in your poop. Do not take loperamide.
  • Today: signs of dehydration, such as dark pee, peeing little, or dizziness, that last after rehydration packets, or you cannot keep fluids down.
  • Today: no better after 3 days, or severe belly pain, yellow skin or a rash.
  • Home: diarrhea that starts within 10 days of return or lasts past 2 weeks. See your doctor, give a stool sample, and say where you went.
  • Been where cholera is found, with severe watery diarrhea and vomiting: a doctor today.
  • A fever after a trip to a country with malaria in the last 12 months, even with diarrhea: a malaria test today. Urgent care or your doctor today.

I am not a doctor. This is not medical advice. This is self-education. Every dose on this page is the one a trial or a label used, quoted from it. It is not a prescription. Talk to a physician or travel clinic who has your history before any medicine, vaccine or supplement. A fever, blood in your poop or dehydration: see a doctor first.