The BRAT diet is commonly recommended for diarrhea: bananas, rice, applesauce and toast. Eat small amounts frequently rather than whole meals. Call the doctor when you see signs of dehydration, bloody stools or fever.

If you contract "Traveler's Diarrhea" in Costa Rica, the most critical step is aggressive rehydration using bottled water or oral rehydration salts (ORS), which are available at local pharmacies known as farmacias. You should avoid tap water in rural areas and stick to a "BRAT" diet (Bananas, Rice, Applesauce, Toast) while symptoms persist. Most cases are mild and resolve within 24–48 hours; however, you can find over-the-counter medications like loperamide (Imodium) for symptomatic relief. If you experience a high fever, bloody stools, or severe abdominal pain, you should seek medical attention at a local Clínica or Ebais. Costa Rica has an excellent healthcare system, and many pharmacists are trained to provide consultations for minor ailments and can dispense appropriate antibiotics if a bacterial infection is suspected. Always ensure you have travel insurance that covers "outpatient" visits just in case.