Does antibiotic treatment treat traveller's diarrhoea?

Traveller's diarrhoea can follow exposure to bacteria, viruses, or parasites in contaminated food or water. Many episodes settle with fluids and rest. An antibiotic may be considered by a clinician for selected cases, especially when illness is severe or prolonged, but it should not be used automatically. The wrong medicine may cause side effects and will not treat a non-bacterial cause.

The main immediate concern is loss of fluid and salts. Small, frequent sips of safe water or an oral rehydration drink can help. Be cautious with anti-diarrhoeal medicines if you have fever or blood in the stool, and ask a pharmacist or clinician first.

Keep drinking, eat simple foods when able, and wash hands carefully after using the toilet. Seek medical advice before taking antibiotics, particularly if you are pregnant, have a long-term illness, or take regular medicines. A clinician may ask about travel, food and water exposure, fever, blood, duration, and other symptoms before deciding on treatment.

Get urgent medical help for signs of dehydration such as faintness, confusion, very little urine, or inability to keep fluids down. Seek prompt assessment for blood or black stool, severe abdominal pain, high fever, or diarrhoea that is worsening or not settling. Children, older adults, and people with weakened immunity may need earlier advice.

Ask whether your symptoms suggest a bacterial cause, which rehydration option is suitable, and what changes should trigger urgent care.