Prophylactic antibiotics for UTI

Prophylaxis means taking an antibiotic to reduce the chance of future urinary infections, rather than treating symptoms already present. A clinician may first confirm that episodes are UTIs, review urine results, sexual or other triggers, pregnancy status, kidney function, allergies and previous antibiotic exposure.

Possible downsides include nausea, diarrhoea, thrush, allergic reactions and antibiotic resistance. The chosen medicine and schedule depend on the person; a treatment that helped one infection may not be appropriate for prevention.

Do not start leftover antibiotics or share them. If prophylaxis is prescribed, take it exactly as directed and report rash, swelling, severe diarrhoea, breathing difficulty or other concerning effects. Keep a record of urinary symptoms and any culture results so the plan can be reviewed.

Ask about non-antibiotic measures and whether a trigger-based or time-limited approach is suitable. Seek advice promptly for new burning, frequency, blood in urine, fever or back pain rather than assuming preventive medicine will treat an active infection.

Seek urgent medical advice for fever with urinary symptoms, pain in the side or back, vomiting, confusion, fainting, pregnancy with suspected infection, or feeling seriously unwell. Emergency help is needed for trouble breathing, facial swelling or collapse after an antibiotic.

Have my episodes been confirmed as UTIs? What are the benefits and risks of prevention for me? Which tests or cultures are needed? Could another strategy work? How will we review or stop prophylaxis?