What is the best treatment for traveler's diarrhea after returning from Central America?

Supportive care is the most appropriate initial treatment for traveler's diarrhea in many cases, especially when symptoms are mild. This involves ensuring adequate hydration and electrolyte balance, which can often resolve symptoms without the need for medications.

Travelers' diarrhea is commonly caused by bacterial pathogens, and while some cases may require antibiotics, supportive care should be the first step to avoid unnecessary medication, especially for mild cases. This approach is particularly crucial given that many acute gastroenteritis episodes self-resolve as the body's immune system fights off the infection.

Additionally, while antibiotics can be beneficial for certain severe cases or specific pathogens, they are not always necessary and can lead to complications such as antibiotic resistance or adverse effects. Quinolone antibiotics, for instance, may be effective but are typically reserved for patients with more severe symptoms or those who are immunocompromised.

Gastric lavage is not indicated for traveler's diarrhea, especially once the illness has already begun, as it is not an effective treatment for this type of infection and poses risks.

In conclusion, supportive care remains the cornerstone of treatment for traveler’s diarrhea for most patients, emphasizing the importance of hydration as the primary intervention.