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Randomised controlled trial
Cranberry capsules (2 taken twice daily for an average 38 days) reduce the risk of postoperative urinary tract infection in women undergoing benign gynaecological surgery involving intraoperative catheterisation
  1. Alexis A Dieter
  1. Correspondence to : Dr Alexis A Dieter, Urogynecology and Reconstructive Pelvic Surgery Division, Department of Obstetrics and Gynecology, The University of North Carolina at Chapel Hill, 3032 Old Clinic Bldg, CB#7570, Chapel Hill, NC 27599-7570, USA; doctordietermd{at}

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Urinary tract infections (UTI) are a common bacterial infection and postoperative UTIs cause significant morbidity and healthcare burden.1 Studies examining postoperative antibiotic prophylaxis to prevent postoperative UTI have yielded inconsistent results and antibiotics carry a risk of side effects and bacterial resistance.2 Cranberry is well tolerated and widely used to prevent recurrent UTIs. This study investigates the use of cranberry capsules to prevent postoperative UTI following benign gynaecological surgery.


This randomised double-blind, placebo-controlled trial investigates whether cranberry (2 capsules two times per day, equivalent to two 8 oz servings of cranberry juice) taken for approximately 6 weeks after gynaecological surgery reduces postoperative UTI. Participants were non-pregnant women …

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  • Competing interests None declared.

  • Provenance and peer review Commissioned; internally peer reviewed.