Completed

Cranberry Juice Impact on Antibiotic Absorption in UTI Treatment

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What is being tested

Data Collection

Who is being recruted

Urogenital Diseases+4

+ Female Urogenital Diseases and Pregnancy Complications

+ Infections

From 6 to 50 Years
+6 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Treatment Study

Interventional
Study Start: July 2006
See protocol details

Summary

Principal SponsorNational Center for Complementary and Integrative Health (NCCIH)
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: July 1, 2006

Actual date on which the first participant was enrolled.

Many people drink cranberry juice to prevent urinary tract infections (UTIs), even though its effectiveness is not fully proven. Recent findings suggest that cranberry juice might interfere with how the body processes antibiotics used for UTI treatment. This study aims to find out if drinking cranberry juice while taking two common UTI antibiotics, amoxicillin and cefaclor, reduces their concentration in the urine. The study involves children undergoing UTI treatment and adults without UTIs. Children participating in the study will continue their amoxicillin/cefaclor treatment as prescribed. After 7 to 10 days of antibiotic treatment, they will either receive cranberry juice for 2 days or no additional treatment. Urine samples will be taken from all child participants before and after giving cranberry juice to check antibiotic levels. Adult participants will receive two different doses of amoxicillin, either with or without cranberry juice. Blood and urine samples will be collected to see how cranberry juice affects the body's absorption and elimination of amoxicillin.

Official TitleCranberry: Interactions With Anti-Infectious Agents
Principal SponsorNational Center for Complementary and Integrative Health (NCCIH)
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

18 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.


Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 6 to 50 Years

Range of ages for which participants are eligible to join.

Healthy volunteers allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Urogenital DiseasesFemale Urogenital Diseases and Pregnancy ComplicationsInfectionsUrinary Tract InfectionsUrologic DiseasesFemale Urogenital DiseasesMale Urogenital Diseases

Criteria

2 inclusion criteria required to participate
Urinary tract infection (UTI) treated with cefaclor or amoxicillin

No UTI

4 exclusion criteria prevent from participating
Smoker

Allergies to antibiotics

Use of medications other than oral contraceptives

Pregnancy or breast-feeding

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Study Objectives

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

University of Washington

Seattle, United StatesOpen University of Washington in Google Maps
CompletedOne Study Center
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