Guide

Medicines for diarrhoea and rehydration

Prepared by the LekCheck team · Last reviewed: 2026-06-29 · How we create our content

In acute diarrhoea, restoring fluids and salts (rehydration) is the most important thing. Some over-the-counter remedies ease the symptoms but are not suitable for every case. Below are the commonly used ingredients; choose one to see products and prices. For high fever, blood in the stool or signs of dehydration, see a doctor.

This guide was prepared by the LekCheck team and has not been reviewed by a doctor or pharmacist. This article is for general information only and is not medical advice, diagnosis, or treatment. Do not start, stop, or change any treatment without consulting a doctor or pharmacist.

Rehydration

Taking enough fluids and electrolytes (rehydration solutions) is the basis of treatment for diarrhoea, especially in children and older adults, in whom dehydration sets in faster.

Loperamide and adsorbents

Loperamide reduces the frequency of bowel movements, but is not suitable for all types of diarrhoea (e.g. with high fever or blood). Adsorbents such as diosmectite are also used. Probiotics are sometimes used as an addition.

When to see a doctor

See a doctor for blood or mucus in the stool, high fever, severe abdominal pain, profuse diarrhoea or one lasting more than a few days, signs of dehydration (dryness, little urine, weakness), or if the diarrhoea is in an infant, a small child, a pregnant woman or an older person.