How long does antibiotic treatment take to work for traveller's diarrhoea?

Diarrhoea has many causes, and antibiotics are not suitable for every episode. Improvement means fewer loose stools, less cramping, and a better ability to drink. The medicine may not stop symptoms immediately, and the gut can remain sensitive after the infection settles. If there is no improvement within the timeframe given by your clinician, the cause or treatment may need reassessment, especially after recent travel.

Take the prescribed medicine exactly as directed and do not share it. Sip safe fluids frequently; oral rehydration solution can replace water and salts lost through diarrhoea. Eat small, simple meals when able. Wash hands carefully after using the toilet and before handling food. Avoid preparing food for others while ill. Ask a clinician before using an anti-diarrhoeal medicine if you have fever, blood in the stool, or significant abdominal pain.

Seek prompt care for blood or black stool, severe abdominal pain, repeated vomiting, faintness, confusion, very little urine, or difficulty drinking. A high fever or diarrhoea that continues without improvement also needs assessment. Get urgent help for signs of severe dehydration or collapse. Tell the clinician where you travelled and whether you took antibiotics, because this can guide testing and treatment.

Ask whether antibiotics are appropriate for your symptoms, how much oral rehydration to use, and when you can safely travel or return to work. Clarify which warning signs should prompt a local medical visit during your trip.