Diarrhoea: rehydration comes before symptom control

In diarrhoea, the first job is usually not to stop the bowel but to keep fluids and salts coming in. This category is therefore easiest to compare in two parts. There are products used for rehydration, and there are medicines that may reduce stool frequency in selected short-term situations.

The right choice depends on the wider picture. A short-lived loose bowel without fever or blood is different from diarrhoea with repeated vomiting, travel exposure, frailty, pregnancy, or signs of dehydration. In many cases, steady drinking does more for safety and recovery than moving quickly to symptom-blocking medicines.

If the symptom is intense, the user is older, pregnant, or otherwise more vulnerable, or the person cannot drink enough to replace losses, product comparison should give way to assessment sooner rather than later.

Seek care if there is blood in the stool, high fever, severe abdominal pain, clear dehydration, marked weakness, or symptoms that do not settle.