Recurrent UTI in Women

Doses are oral and for adults unless otherwise stated. Visit the Health Products Regulatory Board website or the printed Irish Medicines Formulary for drug SPCs, dosage, contraindications, interactions, or IMF/BNF/BNFC/MIMS. See guidance on dosing in children for quick reference dosage/weight guide.

Letters indicate strength of evidence range from A+ (systematic review) to D (informal opinion). Statins can interact with some antibiotics and increase the risk of rhabdomyolysis. Amiodarone and drugs which prolong the QT interval can interact with many antibiotics. Many antibiotics increase the risk of bleeding with anticoagulants. Please refer to our Drug Interactions Table for further information.

Comments from Expert Advisory Committee

  • If ≥ 3 episodes per year, continuous or post-coital prophylaxis with antibiotics can be effective.  However, both are associated with antibiotic side effects. B+
  • Cranberry juice and cranberry products may also be useful.  There is no evidence for the effectiveness of standby antibiotics.


Treatment Dose TX Duration
nitrofurantoin 50 mg Stat post-coital
OR trimethoprim 100 mg OD at night

Patient Information

The HSE Health A-Z website provides patient information on many hundreds of conditions and treatments.

We recommend patients use the website developed by HSE/ICGP/IPU partnership for tips on how to get better from common infections without using antibiotics, what you can do for yourself or a loved one and when to seek help.

Reviewed June 2016

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