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Study identifier: NCT05677282 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Single Dose Antibiotic Treatment of Acute Watery Diarrhea, Rifaximin Versus Azithromycin, With Loperamide Adjunct

Condition: Diarrhoea;Acute · Diarrhea Travelers  ·  Sponsor: Henry M. Jackson Foundation for the Advancement of Military Medicine

PhasePhase 4
Planned participants150
Who can joinAll sexes, 18 Years to 60 Years
Healthy volunteersNo

About this study

The purpose of this study is to compare a single dose of rifaximin with loperamide to the current standard approach of single dose azithromycin with loperamide for the treatment of acute watery traveler's diarrhea (TD). The study requires 1) taking a single dose antibiotic plus loperamide to treat TD, 2) providing blood and stool samples at different time points to evaluate infection and immune responses, 3) completing a daily symptom diary following treatment, 4) being seen by the study doctor to monitor illness and recovery, and 5) completing a brief electronic questionnaire at 3 months. Participants will be randomly assigned to one of the two treatment groups. The two groups are 1) rifaximin 550 mg as a single dose with loperamide 4 mg initially followed by 2 mg after each unformed stool or 2) azithromycin 500 mg as a single dose with loperamide 4 mg initially followed by 2 mg after each unformed stool. Both groups will take the antibiotic dose and 4 mg of loperamide.

This description comes directly from the study's public registry record.

Talk to the study team

Principal Investigator  ·  240-855-6584  ·  dtribble@idcrp.org

Always discuss trial participation with your own doctor first.

Locations (4)

Camp Lemonnier DjiboutiDjibouti, DjiboutiRecruiting
JTF-Bravo, Soto Cano ABComayagua, HondurasRecruiting
British Army Training Site UKNanyuki, KenyaRecruiting
Fort Magsaysay & Camp AguinaldoSanta Rosa, Nueva Ecija, PhilippinesActive Not Recruiting

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Source record: clinicaltrials.gov/study/NCT05677282