Skip to content

Can cranberry Extract Supplement prevent urinary tract infections?

Preventive Effect of Cranberry Extract Supplement Urinary Tract Infections in Male Patients With Lower Urinary Tract Symptoms

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCTs041260038
Enrollment
220
Registered
2026-06-11
Start date
2026-06-11
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Benign prostatic hyperplasia

Interventions

Participants will be assigned to receive either cranberry tablets or placebo tablets for a duration of 12 months.

Sponsors

Teruo Inamoto
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: 1. Patients aged over 18 years with benign prostatic hyperplasia. 2.Patients with a prostate volume over 30 mL and a post-void residual urine volume under 100 mL, as assessed by transabdominal ultrasonography. 3.Patients who have provided written informed consent to participate in this study.

Exclusion criteria

Exclusion criteria: 1.Patients currently diagnosed with and undergoing treatment for UTI. 2.Patients with severe hepatic or renal dysfunction (Child Pugh C, eGFR under 30) 3.Patients receiving warfarin or sodium valproate. 4.Patients with hypersensitivity to cranberry. 5.Patients with severe food allergies 6.Patients undergoing treatment for urolithiasis 7.Patients with cognitive impairment or decline in ADL severe enough to make completion of a voiding diary difficult 8.Patients deemed unsuitable for participation by the principal investigator or sub investigators

Design outcomes

Primary

MeasureTime frame
Time to onset of UTI during the 12-month observation period.

Secondary

MeasureTime frame
Urinalysis Urinary sediment examination Urine culture (bacterial species, colony count) Treatment adherence/compliance rate Voiding diary (mean voided volume per micturition, daytime urinary frequency, nocturnal urinary frequency, nocturnal urine volume, NPI [nocturnal polyuria index]) Occurrence of fever, urinary frequency, urgency, dysuria, and CVA tenderness IPSS, OABSS, QOL scores Incidence of UTI related hospitalization Bristol Stool Scale GSRS (Gastrointestinal Symptom Rating Scale) Adverse events (primarily gastrointestinal symptoms and occurrence of urolithiasis)

Contacts

Public ContactWatanabe Kyohei

Hamamatsu University School of Medicine

kyouhei2@hama-med.ac.jp+81-534352111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026