What it is used for
- A supplement for urinary-tract support, with clear acknowledgement that evidence of benefit is limited and inconclusive
- An option some people with recurrent urinary infections discuss with a clinician, without treating it as proven treatment or prevention
How it is used
- Follow the supplement label, ask a pharmacist whether the product suits you and do not exceed the stated amount
- Swallow capsules with water or dissolve an effervescent or powder presentation fully as the pack directs
- Check other ingredients such as cranberry, vitamins or sweeteners because they have separate cautions
- Do not delay urine testing or prescribed treatment when infection symptoms develop
Possible side effects
- Diarrhoea or loose stools
- Bloating or wind
- Nausea or abdominal discomfort
- Rare rash or allergy
Who should not use it
- Allergy to D-mannose or any product ingredient
Before and while using it
- Fever, flank pain, vomiting, blood in urine or feeling very unwell can indicate a kidney infection and needs urgent assessment
- Burning and frequent urination may be an infection needing testing and treatment; do not rely on the supplement alone
- Ask a clinician before use if you have kidney disease, diabetes or an inherited disorder of sugar handling
- Supplement quality and content vary, and combination products may contain ingredients unsuitable for you
- Lack of proven benefit means you should not stop any prevention or treatment plan prescribed by your clinician
Medicine interactions
- No specific medicine interactions are well established, but tell a clinician or pharmacist about all medicines and supplements, especially with kidney disease or diabetes
Pregnancy and breastfeeding
- Information on concentrated supplements in pregnancy or breastfeeding is inadequate; ask a clinician before use
How to store it
- Keep the product dry in its original pack as labelled and away from children
Get medical help straight away if
- Your face, lips or tongue swell, or you find it hard to breathe.
- You get a severe rash, blistering or peeling skin.
- A side effect worries you or doesn’t go away: contact your doctor or pharmacist.
Questions about this medicine?
Talk to a doctor by video, or send your question by text.
Source: Standard international medicine references
This guide is general information and doesn’t replace advice from your doctor or pharmacist. Don’t start, stop or change a medicine without asking them, and always read the leaflet in the pack.