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ClinicalTrials.gov public records Last synced Oct 2, 2026, 5:54 AM EDT

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Showing 1–19 of 19 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Placebo for Hydrochlorothiazide (HCTZ) Clear all
Completed Phase 4 Interventional

Randomized, Double-Blind, Placebo-Controlled, Forced-Titration, Comparing Telmisartan vs Valsartan. Taken Orally for Eight Weeks in Patients With Stage 1 and Stage 2 Hypertension

NCT00168779
View directory record Official record
Conditions
Hypertension
Interventions
telmisartan 80 mg / hydrochlorothiazide 25 mg, valsartan 160 mg / hydrochlorothiazide 25 mg, placebo
Drug
Lead sponsor
Boehringer Ingelheim
Industry
Eligibility
18 Years and older
Enrollment
1,185 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
113
States / cities
Athens, Alabama • Birmingham, Alabama • Huntsville, Alabama + 90 more
Source: ClinicalTrials.gov public record
Updated Dec 28, 2017 · Synced Oct 2, 2026, 5:54 AM EDT
Completed Phase 4 Interventional Results available

A Study of the Blood Pressure Lowering Ability and Safety of Olmesartan Medoxomil in Stage I and Stage II Hypertension

NCT00430638
View directory record Official record
Conditions
Hypertension
Interventions
olmesartan medoxomil + hydrochlorothiazide, if necessary, Placebo
Drug
Lead sponsor
Daiichi Sankyo
Industry
Eligibility
18 Years and older
Enrollment
278 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
29
States / cities
Birmingham, Alabama • Mobile, Alabama • Muscle Shoals, Alabama + 26 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2018 · Synced Oct 2, 2026, 5:54 AM EDT
Active, not recruiting Early Phase 1 Interventional

Improving Pain Management Via Spinal Cord Stimulation and Blood Pressure Reduction

NCT04676399
View directory record Official record
Conditions
Chronic Pain, Hypertension, Diuretics Drug Reactions, SCS
Interventions
Hydrochlorothiazide 12.5mg, Placebo
Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
40 Years to 79 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 2, 2026, 5:54 AM EDT
Completed Phase 4 Interventional Results available

The Effects of Renin Inhibition on Fibrinolytic Balance and Endothelial Function

NCT03115853
View directory record Official record
Conditions
High Blood Pressure
Interventions
Aliskiren 150 mg, Placebo, HCTZ, Aliskiren 300 mg
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 25, 2017 · Synced Oct 2, 2026, 5:54 AM EDT
Completed Not applicable Interventional

Aldosterone and Vascular Disease in Diabetes Mellitus

NCT00214825
View directory record Official record
Conditions
Diabetes Mellitus, Endothelial Dysfunction, Albuminuria
Interventions
eplerenone, Hydrochlorothiazide
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
21 Years to 64 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 3, 2008 · Synced Oct 2, 2026, 5:54 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 2, 2026, 5:54 AM EDT
Completed Phase 3 Interventional Results available

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

NCT00846365
View directory record Official record
Conditions
Essential Hypertension
Interventions
Azilsartan medoxomil and chlorthalidone, Olmesartan medoxomil-hydrochlorothiazide
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years and older
Enrollment
1,085 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
70
States / cities
Birmingham, Alabama • Haleyville, Alabama • Hueytown, Alabama + 67 more
Source: ClinicalTrials.gov public record
Updated Mar 13, 2012 · Synced Oct 2, 2026, 5:54 AM EDT
Withdrawn Phase 4 Interventional

Ertugliflozin Versus Hydrochlorothiazide in Reducing Sympathetic Neural Overactivity in Patients With Hypertension and Recently-diagnosed Type 2 Diabetes.

NCT03640221
View directory record Official record
Conditions
Hypertension, Diabetes Mellitus, Type 2
Interventions
Ertugliflozin, Hydrochlorothiazide 12.5mg, Microneurography, SKNA recordings, Static Handgrip, Post-handgrip forearm vascular occlusion, Testing of the Arterial Baroreflex Function
Drug · Device · Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
35 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2020 · Synced Oct 2, 2026, 5:54 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 2, 2026, 5:54 AM EDT
Terminated Phase 3 Interventional Results available

Postpartum Management of Hypertension in Pregnancy With Hydrochlorothiazide

NCT03298802
View directory record Official record
Conditions
Pre-Eclampsia, Gestational Hypertension, Superimposed Pre-Eclampsia, Hypertension, Pregnancy-Induced, Postpartum Pregnancy-Induced Hypertension, Postpartum Preeclampsia
Interventions
Hydrochlorothiazide 50mg Tablet, Placebo Tablet
Drug
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
453 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2025
U.S. locations
2
States / cities
Austin, Texas • Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Oct 2, 2026, 5:54 AM EDT
Recruiting Phase 4 Interventional

Treatment of Meniere's Disease With Migraine Medications

NCT05582837
View directory record Official record
Conditions
Ménière
Interventions
nortriptyline + topiramate
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
25 Years to 85 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Oct 2, 2026, 5:54 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 2, 2026, 5:54 AM EDT
Completed Not applicable Interventional Results available

Pharmacologic Treatment of Congenital Nephrogenic Diabetes Insipidus

NCT00478335
View directory record Official record
Conditions
Nephrogenic Diabetes Insipidus
Interventions
sildenafil, calcitonin, hydrochlorothiazide/amiloride, indomethacin, Placebo for sildenafil, placebo for calcitonin
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
5 Years to 25 Years · Male only
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 12, 2018 · Synced Oct 2, 2026, 5:54 AM EDT
Recruiting Phase 1 Interventional

Mitigating the Pro-inflammatory Phenotype of Obesity

NCT04934228
View directory record Official record
Conditions
Blood Pressure, Diabetes, Obesity, Insulin Resistance, Diuretics Drug Reactions, Sympathetic Nerve Activity
Interventions
Hydrochlorothiazide 12.5Mg Tab, Clonidine Pill, Placebo
Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 79 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Oct 2, 2026, 5:54 AM EDT
Completed Not applicable Interventional Results available

Role of Mineralocorticoid Receptor in Diabetic Cardiovascular Disease

NCT00865124
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Vascular Disease
Interventions
Spironolactone, Hydrochlorothiazide + potassium, Placebo
Drug · Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 14, 2017 · Synced Oct 2, 2026, 5:54 AM EDT
Terminated Phase 3 Interventional Results available

A Randomized Controlled Trial of Aliskiren in the Prevention of Major Cardiovascular Events in Elderly People

NCT01259297
View directory record Official record
Conditions
Cardiovascular Events
Interventions
Aliskiren, Amlodipine, Hydrochlorothiazide (HCTZ), Placebo for Aliskiren, Placebo for Amlodipine, Placebo for Hydrochlorothiazide (HCTZ)
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
65 Years and older
Enrollment
2,336 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
14
States / cities
Birmingham, Alabama • Los Angeles, California • Northridge, California + 11 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2014 · Synced Oct 2, 2026, 5:54 AM EDT
Completed Phase 2 Interventional Results available

Study of the Safety and Efficacy of LCZ696 on Arterial Stiffness in Elderly Patients With Hypertension

NCT01692301
View directory record Official record
Conditions
Hypertension
Interventions
LCZ696, Olmesartan, LCZ696 matching placebo, Olmesartan matching placebo, amlodipine, hydrochlorothiazide
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
60 Years and older
Enrollment
454 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
11
States / cities
Clearwater, Florida • Chicago, Illinois • Baltimore, Maryland + 8 more
Source: ClinicalTrials.gov public record
Updated May 4, 2016 · Synced Oct 2, 2026, 5:54 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Vascular Dysfunction in Human Obesity Hypertension

NCT01983462
View directory record Official record
Conditions
Obesity, Prehypertension, Hypertension
Interventions
Clonidine, Hydrochlorothiazide, Placebo
Drug
Lead sponsor
Gary L. Pierce
Other
Eligibility
18 Years to 79 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2020
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Apr 14, 2023 · Synced Oct 2, 2026, 5:54 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Aliskiren/Amlodipine/Hydrochlorothiazide in Patients With Moderate-severe Hypertension

NCT00765674
View directory record Official record
Conditions
Hypertension
Interventions
Aliskiren, Amlodipine, Hydrochlorothiazide (HCTZ), Placebo
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
1,191 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated May 9, 2011 · Synced Oct 2, 2026, 5:54 AM EDT