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Diarrhea clinical trials recruiting in the U.S.
9 studies for Diarrhea are recruiting participants at sites across the United States.
Diarrhea can range from mild to severe and can be dangerous in children. Find out what you can do to treat symptoms and when to call your doctor.
By state
Recently updated studies
A Study of Brenipatide (LY3537031) in Participants With Irritable Bowel Syndrome-Diarrhea (IBS-D)
RecruitingPhase 2
Ages 18 to 75 ยท All sexes ยท Updated Sep 22, 2026 ยท NCT07545759Fecal Microbiota Transplantation in Treating Immune-Checkpoint Inhibitor Induced-Diarrhea or Colitis in Genitourinary Cancer Patients
RecruitingPhase 1
Ages 18 and older ยท All sexes ยท Updated Sep 18, 2026 ยท NCT04038619Rifaximin 200 mg Plus Oral Rehydration vs Oral Rehydration Alone in Children With Acute Diarrhea
RecruitingPhase 4
Ages 6 to 12 ยท All sexes ยท Updated Aug 13, 2026 ยท NCT07285785Rash & Diarrhea Prophylaxis With Capivasertib
RecruitingPhase 2Healthy volunteers welcome
Ages 18 and older ยท All sexes ยท Updated Jul 29, 2026 ยท NCT07426822A Study of SER-155 to Treat Diarrhea in People on Immunotherapy
RecruitingPhase 1
Ages 18 and older ยท All sexes ยท Updated Jul 28, 2026 ยท NCT06801067Fecal Microbiota Transplantation for IBS
RecruitingPhase 2
Ages 18 to 70 ยท Women ยท Updated May 8, 2026 ยท NCT05776914Novel Pilot Study to Treat Symptoms of IBS With Diarrhea Using Combination Therapy of a Low-FODMAP Diet and a Neuromodulator
RecruitingEarly phase 1
Ages 18 to 70 ยท All sexes ยท Updated Dec 18, 2025 ยท NCT06684470First in Human Dose Escalation Study Evaluating the Safety and Immunogenicity of IVT's Shigella-04 Vaccine in Healthy Young Adults
RecruitingPhase 1Healthy volunteers welcome
Ages 18 to 49 ยท All sexes ยท Updated Nov 19, 2025 ยท NCT07205926Viome Nutritional Programs to Improve Clinical Outcomes for Gastrointestinal Conditions
Recruiting
Ages 25 to 75 ยท All sexes ยท Updated Jan 29, 2025 ยท NCT05465629From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.