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ClinicalTrials.gov public records Last synced Oct 27, 2026, 1:15 AM EDT

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Showing 1–24 of 46 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: chlorthalidone Clear all
Completed Not applicable Interventional

OPTImizing Precision of Hypertension Care to Maximize Blood Pressure Control Pilot (OPTI-BP Pilot)

NCT02814552
View directory record Official record
Conditions
High Blood Pressure
Interventions
HTN PRA App, Blood Sample
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 65 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
3
States / cities
Macclenny, Florida • Old Town, Florida • Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Oct 25, 2018 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Not applicable Interventional

Night Time Use of Thiazide Diuretics for Improved Reduction in Stone Risk in Stone Formers With Elevated Urine Calcium

NCT02711670
View directory record Official record
Conditions
Kidney Stones
Interventions
chlorthalidone, Hydrochlorothiazide
Drug
Lead sponsor
VA New York Harbor Healthcare System
Federal
Eligibility
18 Years to 80 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 27, 2023 · Synced Oct 27, 2026, 1:15 AM EDT
Recruiting Phase 2 Interventional

Cardiac Effects of Mineralocorticoid Receptor Antagonism After Hypertensive Disorders of Pregnancy

NCT07238400
View directory record Official record
Conditions
Hypertension
Interventions
Eplerenone 100 mg daily, Chlorthalidone 25 mg daily, Potassium Placebo, Potassium Chloride
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 27, 2026, 1:15 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Analyzing How Genetics May Affect Response to High Blood Pressure Medications

NCT00563901
View directory record Official record
Conditions
Hypertension, Coronary Disease, Cerebrovascular Accident
Interventions
Not listed
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
55 Years and older
Enrollment
37,939 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2004
U.S. locations
2
States / cities
Minneapolis, Minnesota • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 4, 2014 · Synced Oct 27, 2026, 1:15 AM EDT
Recruiting Phase 4 Interventional

Mineralocorticoid Receptor, Coronary Microvascular Function, and Cardiac Efficiency in Hypertension

NCT05593055
View directory record Official record
Conditions
Hypertension, Left Ventricular Hypertrophy
Interventions
Eplerenone, Chlorthalidone, Potassium
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Oct 27, 2026, 1:15 AM EDT
Terminated Phase 2 Interventional Results available

Safety and Efficacy of Chlorthalidone in Type 1 Diabetes

NCT03325114
View directory record Official record
Conditions
Type 1 Diabetes Mellitus, Hypercalciuria
Interventions
Chlorthalidone
Drug
Lead sponsor
University of Rochester
Other
Eligibility
12 Years to 21 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 3 Interventional Results available

A Safety and Tolerability Study of Azilsartan Medoxomil in Participants With Essential Hypertension

NCT00696384
View directory record Official record
Conditions
Hypertension
Interventions
Azilsartan medoxomil, Azilsartan medoxomil, with or without chlorthalidone and other non-angiotensin II receptor blocker antihypertensive medications., Placebo
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years and older
Enrollment
418 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
33
States / cities
Huntsville, Alabama • Chandler, Arizona • Mesa, Arizona + 30 more
Source: ClinicalTrials.gov public record
Updated Jan 4, 2012 · Synced Oct 27, 2026, 1:15 AM EDT
Completed No phase listed Observational

Hypertension Screening and Treatment Program

NCT00007592
View directory record Official record
Conditions
Hypertension
Interventions
Chlorthalidone, Furosemide
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1989
U.S. locations
11
States / cities
Sepulveda, California • Washington D.C., District of Columbia • Miami, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Jan 21, 2009 · Synced Oct 27, 2026, 1:15 AM EDT
Recruiting Not applicable Interventional

OPtimizing Technology to Improve Medication Adherence and BP Control (OPTIMA-BP)

NCT05293756
View directory record Official record
Conditions
Hypertension, Self-Management, Technology, Quality of Life
Interventions
OPTIMA-BP Intervention
Behavioral
Lead sponsor
Case Western Reserve University
Other
Eligibility
50 Years and older
Enrollment
208 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 3 Interventional Results available

One-Year Safety and Tolerability Study of Azilsartan Medoxomil in Participants With Essential Hypertension

NCT00695955
View directory record Official record
Conditions
Hypertension
Interventions
Azilsartan medoxomil with or without add-on chlorthalidone, Azilsartan medoxomil with or without add-on hydrochlorothiazide
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years and older
Enrollment
669 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
39
States / cities
Ozark, Alabama • Tallassee, Alabama • Long Beach, California + 36 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2011 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Azilsartan Medoxomil and Chlorthalidone Compared to Olmesartan Medoxomil and Hydrochlorothiazide in Participants With Moderate to Severe Hypertension.

NCT01033071
View directory record Official record
Conditions
Essential Hypertension
Interventions
Azilsartan medoxomil and chlorthalidone, Olmesartan medoxomil and hydrochlorothiazide
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years and older
Enrollment
1,071 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
84
States / cities
Gulf Shores, Alabama • Litchfield Park, Arizona • Mesa, Arizona + 81 more
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Oct 27, 2026, 1:15 AM EDT
Withdrawn Phase 4 Interventional

Chlorthalidone Compared to Hydrochlorothiazide on Endothelial Function

NCT01822860
View directory record Official record
Conditions
Hypertension
Interventions
Chlorthalidone 12.5 mg, Hydrochlorothiazide 25 mg, Placebo
Drug
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 25, 2015 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Azilsartan Medoxomil and Chlorthalidone in Participants With Moderate to Severe Hypertension

NCT00818883
View directory record Official record
Conditions
Essential Hypertension
Interventions
Azilsartan medoxomil and chlorthalidone, Azilsartan medoxomil and hydrochlorothiazide
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years and older
Enrollment
609 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
50
States / cities
Birmingham, Alabama • Gulf Shores, Alabama • Scottsboro, Alabama + 47 more
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Pilot Study of the Impact of the Patient Activated Learning System (PALS) on Knowledge Acquisition, Recall, and Decision Making

NCT03156634
View directory record Official record
Conditions
Patient Education
Interventions
PALS, WebMD
Other
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
118 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2019 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Not applicable Interventional Results available

Ambulatory vs Office BP Management Usual Care for Diagnosing and Managing Hypertension: A Pilot Study

NCT02121041
View directory record Official record
Conditions
Hypertension
Interventions
Amlodipine, Chlorthalidone, Losartan
Drug
Lead sponsor
Anthony J Viera, MD, MPH
Other
Eligibility
30 Years to 65 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 10, 2017 · Synced Oct 27, 2026, 1:15 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Hypertension in Young Adults Trial

NCT05370599
View directory record Official record
Conditions
Hypertension
Interventions
Anti-hypertensive agent: amlodipine, Anti-hypertensive agent: Chlorthalidone, Anti-hypertensive agent: Losartan, Home BP monitoring with cuffed device, Home BP monitoring with cuffed device + BP patch, Home BP monitoring with cuffed device + BP watch
Drug · Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 40 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 4 Interventional

Diuretics and Volume Overload in Early CKD

NCT05171686
View directory record Official record
Conditions
Chronic Kidney Disease, Hypertension
Interventions
Diuretic augmentation (hydrochlorothiazide, chlorthalidone, furosemide, torsemide, or bumetanide)
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 3 Interventional Results available

Diuretic Comparison Project

NCT02185417
View directory record Official record
Conditions
Hypertension
Interventions
Hydrochlorothiazide (HCTZ), Chlorthalidone (CTD)
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
65 Years and older
Enrollment
20,723 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
69
States / cities
Birmingham, Alabama • Anchorage, Alaska • Fayetteville, Arkansas + 64 more
Source: ClinicalTrials.gov public record
Updated May 22, 2024 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Azilsartan Medoxomil Combined With Chlorthalidone in Participants With Moderate to Severe Hypertension

NCT00847626
View directory record Official record
Conditions
Hypertension
Interventions
Azilsartan medoxomil and chlorthalidone, Chlorthalidone, Azilsartan medoxomil
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years and older
Enrollment
1,711 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
84
States / cities
Birmingham, Alabama • Columbiana, Alabama • Tuscaloosa, Alabama + 81 more
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Not applicable Interventional Results available

Preventing Metabolic Side Effects of Thiazide Diuretics With KMgCitrate

NCT02665117
View directory record Official record
Conditions
Hypertension
Interventions
Potassium Magnesium Citrate (KMgCit), Potassium Chloride (KCl), Chlorthalidone
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
21 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
3
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 25, 2023 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Early Phase 1 Interventional

Effects of Antihypertensive Drug Treatment on Brain Blood Flow, Cognition, and Regulation of Nervous System in Older Adults With Hypertension.

NCT06287580
View directory record Official record
Conditions
Essential Hypertension, Older Adults
Interventions
chlorthalidone, Placebo
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
60 Years to 85 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Feb 27, 2026 · Synced Oct 27, 2026, 1:15 AM EDT
Recruiting Not applicable Interventional

Arterial Stiffness and Blood Pressure

NCT06495710
View directory record Official record
Conditions
Hypertension, Vascular Stiffness, Aging
Interventions
Blood pressure treatment algorithm
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
60 Years and older
Enrollment
228 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
3
States / cities
Birmingham, Alabama • Nashville, Tennessee • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 27, 2026, 1:15 AM EDT
Completed No phase listed Observational

Genetics of Hypertension Associated Treatments (GenHAT)

NCT00006294
View directory record Official record
Conditions
Cardiovascular Diseases, Heart Diseases, Hypertension, Coronary Disease, Myocardial Infarction
Interventions
Chlorthalidone, Lisinopril, Amlodipine, Doxazosin
Drug
Lead sponsor
Donna Arnett, 257-5678
Other
Eligibility
55 Years and older
Enrollment
37,939 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2005
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Apr 26, 2024 · Synced Oct 27, 2026, 1:15 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Tolerance to Target Doses of Thiazides in Actual Practice: A Feasibility Study

NCT01235377
View directory record Official record
Conditions
Hypertension
Interventions
Favor one of two thiazides for new prescriptions & attempt target dose
Other
Lead sponsor
VA Pharmacy Benefits Management Strategic Healthcare Group
Federal
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
5
States / cities
Hines, Illinois • Asheville, North Carolina • Wilkes-Barre, Pennsylvania + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 25, 2014 · Synced Oct 27, 2026, 1:15 AM EDT