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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Tap Water Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Pharmacokinetics of Melatonin Administered in Oral, Lotion, and Bubble Bath Formulations

NCT06382610
View directory record Official record
Conditions
Sleep
Interventions
Melatonin
Dietary Supplement
Lead sponsor
University of Redlands
Other
Eligibility
18 Years to 21 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Redlands, California
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

In Situ Erosion Study to Investigate the Effectiveness of an Experimental Toothpaste

NCT03296072
View directory record Official record
Conditions
Tooth Erosion
Interventions
0.254% w/w sodium fluoride and 5% KNO3, 0.454% w/w stannous fluoride, 5% KNO3
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 15, 2020 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 2 Interventional Results available

Smell Changes & Efficacy of Nasal Theophylline

NCT03990766
View directory record Official record
Conditions
Olfactory Disorder, Anosmia, Viral Infection, Theophylline Causing Adverse Effects in Therapeutic Use, Smell Disorder
Interventions
Theophylline, Saline Nasal
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 30, 2022 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Changes in Plasma Amino Acid Appearance After Adding Bacillus Coagulans GBI-30, 6086 to Milk Protein Concentrate

NCT05313178
View directory record Official record
Conditions
Protein Malabsorption
Interventions
Bacillus Coagulans GBI-30, 6086
Dietary Supplement
Lead sponsor
Lindenwood University
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 16, 2024 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Food Effect Study on the Bioavailability and PK of PA-824 Tablets in Healthy Adult Subjects (CL-009)

NCT01830439
View directory record Official record
Conditions
Tuberculosis
Interventions
PA-824 200mg, PA-824 50mg
Drug
Lead sponsor
Global Alliance for TB Drug Development
Other
Eligibility
19 Years to 50 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 5, 2019 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effective Treatments for Jellyfish Stings

NCT02015195
View directory record Official record
Conditions
Jellyfish Stings
Interventions
Acetic Acid (5%), Sodium Bicarbonate Slurry (50%), Papain Slurry (70%), Ammonia (10%), Lidocaine (4%), Isopropyl Alcohol (70%), Hot Tap Water (40 degrees Celsius), No treatment
Other · Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2015 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 1 Interventional

A Study to Assess the Effect of Abiraterone Acetate in Male Participants With Mild or Moderate Hepatic Impairment Compared to Matched Control Participants With Normal Hepatic Function

NCT02001571
View directory record Official record
Conditions
Prostate Cancer
Interventions
Abiraterone acetate
Drug
Lead sponsor
Cougar Biotechnology, Inc.
Industry
Eligibility
40 Years to 80 Years · Male only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Dec 4, 2013 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cooling Strategies for Older Adults in the Heat

NCT06349616
View directory record Official record
Conditions
Aging
Interventions
Intermittent cold-water hand and forearm immersion, No intermittent cold-water hand and forearm immersion
Other
Lead sponsor
Penn State University
Other
Eligibility
65 Years to 100 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 23, 2025 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional

Evaluation of the Impact of Water Access and Promotion in Parks on Beverage Intake

NCT03889561
View directory record Official record
Conditions
Obesity
Interventions
Drink Tap
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
Not listed
Enrollment
1,038 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 26, 2023 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Fluoride in Saliva After Use of Fluoride Toothpastes Followed by Fluoride Mouthrinses

NCT05601154
View directory record Official record
Conditions
Dental Caries
Interventions
Crest Cavity Protection toothpaste, Crest Cavity Protection toothpaste followed by Act Mint Fluoride Rinse, Colgate PreviDent 5000+ toothpaste, Colgate PreviDent 5000+ toothpaste followed by Act Mint Fluoride Rinse
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 11, 2026 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Safety Study of Orally Administered BPM31510 in Healthy Subjects

NCT02486055
View directory record Official record
Conditions
Healthy
Interventions
BPM31510 Oral Nanosuspension 4%
Drug
Lead sponsor
BPGbio
Industry
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Eatontown, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 21, 2016 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 4 Interventional Results available

Esophageal Food Impaction

NCT03305848
View directory record Official record
Conditions
Esophageal Food Bolus Obstruction
Interventions
Nitrostat 0.4Mg Sublingual Tablet
Drug
Lead sponsor
HealthPartners Institute
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 7, 2023 · Synced Sep 19, 2026, 12:53 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Evaluation of the Tap Trust Intervention on Water Security Experiences and Beverage Intake

NCT07197216
View directory record Official record
Conditions
Beverage Intake, Child Health and Nutrition
Interventions
Tap Trust
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 11, 2025 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Water Up@ At Home: An Intervention to Replace Sugary Drinks With Water

NCT05159622
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Water Up! at Home
Behavioral
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Feb 12, 2023 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Evaluating Distribution of a Tenofovir Douche With Tap Water Douching and Simulated Receptive Anal Intercourse

NCT04195776
View directory record Official record
Conditions
HIV/AIDS, HIV Prevention
Interventions
Tenofovir Douche
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older · Male only
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 16, 2023 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Enema Use and Acceptability in HIV Negative Men Who Have Sex With Men

NCT00696618
View directory record Official record
Conditions
HIV Infections
Interventions
Fleet Enema, tap water enema, Normosol-R enema
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older · Male only
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 27, 2017 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Oral and Dermal Tolerability Clinical Study of an Experimental Denture Wipe

NCT03478644
View directory record Official record
Conditions
Denture Cleansers
Interventions
Experimental Denture Wipe, Tap Water
Device · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 80 Years
Enrollment
152 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 14, 2018 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Crossover Trial of the Effect of a High-Fat Meal on the PK of Oral CHR 2797 in Healthy Male Subjects

NCT01638442
View directory record Official record
Conditions
Healthy
Interventions
CHR-2797
Drug
Lead sponsor
CTI BioPharma
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Evansville, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 17, 2023 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Food Effect Study on the Bioavailability and PK of PA-824 Tablets in Healthy Adult Subjects

NCT01828827
View directory record Official record
Conditions
Tuberculosis
Interventions
PA-824 1000 mg
Drug
Lead sponsor
Global Alliance for TB Drug Development
Other
Eligibility
19 Years to 50 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 13, 2016 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Study of the Safety of QRH-882260 Heptapeptide

NCT02574858
View directory record Official record
Conditions
Healthy Adults
Interventions
QRH-882260
Drug
Lead sponsor
University of Michigan
Other
Eligibility
25 Years to 100 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 1, 2018 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Study to Investigate Salivary Flow and Potential of Hydrogen (pH) Following Use of Essential-Oil Containing Mouthwashes

NCT06136455
View directory record Official record
Conditions
Healthy
Interventions
Listerine Clinical Solutions Teeth Strength, Listerine Total Care Zero Alcohol Mouthwash, Listerine Cool Mint Zero Alcohol Mouthwash, Colgate Cavity Protection Toothpaste
Drug · Other
Lead sponsor
Johnson & Johnson Consumer Inc. (J&JCI)
Industry
Eligibility
18 Years and older
Enrollment
164 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Jan 2, 2024 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

A Pilot Feasibility Study of Activated Charcoal in Healthy Volunteers

NCT04204772
View directory record Official record
Conditions
Healthy Adult Volunteers
Interventions
Activated charcoal and Tap Water, Activated Charcoal and Apple Juice
Biological
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 25, 2023 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional

EGD-assisted Bowel Preparation for Colonoscopy

NCT01563744
View directory record Official record
Conditions
Esophagoscopy Techniques, Colonoscopy
Interventions
EGD-assisted administration of colonoscopy prep, Control Group received standard prep by oral administration
Procedure
Lead sponsor
Rockford Gastroenterology Associates
Other
Eligibility
Not listed
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
2
States / cities
Rockford, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 18, 2016 · Synced Sep 19, 2026, 12:53 AM EDT
Completed Not applicable Interventional

The Effect of Coffee After Resection of Small Bowel

NCT03143621
View directory record Official record
Conditions
Postoperative Ileus
Interventions
Coffee, Water
Dietary Supplement · Other
Lead sponsor
Mount Carmel Health System
Other
Eligibility
18 Years to 100 Years
Enrollment
79 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 15, 2023 · Synced Sep 19, 2026, 12:53 AM EDT