If you have any questions about this information, you can contact the Drugs in Breastmilk team through their Facebook page  or on druginformation@breastfeedingnetwork.org.uk.

If you are breastfeeding you can take loperamide and/or rehydrating solutions and breastfeed as normal

Acute diarrhoea is a sudden onset of loose and/or frequent bowel motions. It may be caused by infections e.g. food poisoning or a virus. Symptoms may be accompanied by stomach cramps, temperature and headache.

There is no need to stop breastfeeding if you have diarrhoea but you should be very careful with hand hygiene e.g. after going to the toilet and before you touch food. 

You will pass on antibodies to baby though your breastmilk, which will help to combat the risk of infection. Breastfed babies are much less likely to suffer from tummy upsets than formula fed infants.

Symptoms of acute diarrhoea usually settle within a few days as the immune system deals with the infection. You need to ensure that you remain well hydrated by drinking additional fluids, ideally water or rehydration solutions e.g. Dioralyte^®. These do not stop the diarrhoea but prevent dehydration.

If you feel that you need to take medication you can purchase anti-diarrhoea drugs over the counter in pharmacies. Loperamide (Imodium^®) is the drug most widely used. The dose is two capsules to start then one after each loose bowel motion. You can take it when breastfeeding as it is poorly absorbed from the gut and minimal amounts reach breastmilk.

You can also take paracetamol to relieve any headache or temperature at the same time. You may not feel like eating for a while but there is no reason to starve for any period.  If symptoms continue for more than a few days, you are passing blood in your bowel motion or if you have recently returned from a trip abroad you should consult your GP.

Bibliography

• British National Formulary
• NHS page on diarrhoea: https://www.nhs.uk/symptoms/diarrhoea-and-vomiting/
• Hale TW. Medications in Mothers Milk
• Jones W Breastfeeding and Medication 2018 Routledge
• Lactmed website https://www.ncbi.nlm.nih.gov/books/NBK501922/

©The Breastfeeding Network. Published Sept 2019. Last amended March 2026.