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ClinicalTrials.gov public records Last synced Oct 18, 2026, 7:39 PM EDT

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Showing 1–24 of 160 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: HCTZ Clear all
Completed Not applicable Interventional Results available

A Translational Approach to Gitelman Syndrome

NCT00822107
View directory record Official record
Conditions
Gitelman Syndrome
Interventions
Hydrochlorothiazide
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
21 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 5, 2019 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Early Phase 1 Interventional

N-of-1 Trials for Blood Pressure Medications in Adults

NCT02744456
View directory record Official record
Conditions
Hypertension, High Blood Pressure
Interventions
Losartan, Amlodipine, Hydrochlorothiazide
Drug
Lead sponsor
Columbia University
Other
Eligibility
21 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 Mar 26, 2019 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

8-week Study to Evaluate Safety and Efficacy of Various Combinations of Valsartan, HCTZ, and Amlodipine in Patients With Moderate to Severe Hypertension

NCT00327587
View directory record Official record
Conditions
Hypertension
Interventions
Valsartan + amlodipine, Valsartan + HCTZ, Amlodipine + HCTZ, Valsartan + amlodipine + HCTZ
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years to 85 Years
Enrollment
2,279 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 8, 2011 · Synced Oct 18, 2026, 7:39 PM EDT
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 18, 2026, 7:39 PM EDT
Completed Phase 3 Interventional

A Clinical Study to Evaluate the Safety and Efficacy of the Combination of Aliskiren and Valsartan in Hypertensive Non Responders Patients

NCT00219193
View directory record Official record
Conditions
Hypertension
Interventions
aliskiren
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
641 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Oct 18, 2026, 7:39 PM 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 18, 2026, 7:39 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Nebivolol on Skeletal Muscle During Exercise in Hypertensive Patients

NCT01501929
View directory record Official record
Conditions
Hypertension
Interventions
Metoprolol succinate, Nebivolol, Non-invasive measurement of Cardiac Output (CO), Endothelial cell collection, Microvascular perfusion assessment using Definity
Drug · Procedure
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2015
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 6, 2018 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 3 Interventional

A Safety and Efficacy Trial of the Combination of Aliskiren / Hydrochlorothiazide (HCTZ)(300/12.5 mg and 300/25 mg) Compared to Aliskiren 300 mg in Hypertensive Patients

NCT00386139
View directory record Official record
Conditions
Hypertension
Interventions
Aliskiren/HCTZ
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
881 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 3 Interventional

Ramipril and Hydrochlorothiazide Alone and in Combination for the Treatment of Essential Hypertension

NCT00355589
View directory record Official record
Conditions
Hypertension, Blood Pressure, High
Interventions
Ramipril and hydrochlorothiazide
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
60
States / cities
Birmingham, Alabama • Huntsville, Alabama • Glendale, Arizona + 51 more
Source: ClinicalTrials.gov public record
Updated Oct 10, 2012 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 4 Interventional

An Examination of the Safety and Blood Pressure Lowering Effect of Increasing Doses of Benicar® and Benicar® HCT in Patients With Hypertension

NCT00185068
View directory record Official record
Conditions
Hypertension
Interventions
Olmesartan medoxomil, Olmesartan medoxomil/hydrochlorothiazide, Hydrochlorothiazide
Drug
Lead sponsor
Daiichi Sankyo
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004
U.S. locations
16
States / cities
Fort Lauderdale, California • Long Beach, California • Roseville, California + 13 more
Source: ClinicalTrials.gov public record
Updated Sep 16, 2005 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 4 Interventional Results available

Safety/Efficacy of Valsartan/Hydrochlorothiazide Combination Compared to Hydrochlorothiazide in Obese Hypertensive Adults

NCT00439738
View directory record Official record
Conditions
Hypertension
Interventions
HCTZ + Amlodipine, Valsartan/HCTZ
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
40 Years and older
Enrollment
412 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2006
U.S. locations
5
States / cities
Muscle Shoals, Alabama • Westlake Village, California • Oklahoma City, Oklahoma + 2 more
Source: ClinicalTrials.gov public record
Updated May 16, 2017 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 4 Interventional Results available

Pharmacogenomic Evaluation of Antihypertensive Responses

NCT00246519
View directory record Official record
Conditions
Hypertension
Interventions
Hydrochlorothiazide, Atenolol
Drug
Lead sponsor
University of Florida
Other
Eligibility
17 Years to 65 Years
Enrollment
1,701 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
3
States / cities
Gainesville, Florida • Atlanta, Georgia • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 7, 2018 · Synced Oct 18, 2026, 7:39 PM 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 18, 2026, 7:39 PM EDT
Withdrawn Not applicable Interventional

The Pleiotropic Effects of Atorvastatin When Combined With Common Antihypertenisve Medications.

NCT00656331
View directory record Official record
Conditions
Hypertension
Interventions
Amlodipine and Hydrocholorothiazide
Drug
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Jul 11, 2023 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 4 Interventional Results available

Study of the Efficacy and Safety of Aliskiren HCTZ vs Ramipril in Obese Patients (BMI ≥ 30) With Stage 2 Hypertension

NCT00772577
View directory record Official record
Conditions
Hypertension
Interventions
Aliskiren Hydrochlorothiazide, Ramipril
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
386 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
6
States / cities
Beverly Hills, California • Santa Ana, California • Conyers, Georgia + 3 more
Source: ClinicalTrials.gov public record
Updated Mar 11, 2011 · Synced Oct 18, 2026, 7:39 PM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers Results available

Mechanisms of Ramipril Reduction in the Onset of Type 2 Diabetes

NCT00574834
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Ramipril, HCTZ-hydrochlorothiazide, Ramipril+HCTZ
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
20 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 12, 2019 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 3 Interventional

Clinical Study to Evaluate the Efficacy and Safety of Aliskiren Alone and in Combination With Hydrochlorothiazide in Patients With Essential Hypertension.

NCT00219024
View directory record Official record
Conditions
Hypertension
Interventions
aliskiren
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
2,775 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated May 17, 2017 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Bioequivalence Study of Benazepril HCl / Hydrochlorothiazide 20 mg/ 25 mg Tablets Under Fasting Conditions

NCT00778726
View directory record Official record
Conditions
Healthy
Interventions
Benazepril HCl/ Hydrochlorothiazide 20 mg/ 25 mg Tablets
Drug
Lead sponsor
Ranbaxy Laboratories Limited
Industry
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 23, 2008 · Synced Oct 18, 2026, 7:39 PM EDT
Terminated Phase 1Phase 2 Interventional

Default BP Medication Intensification

NCT01994408
View directory record Official record
Conditions
Hypertension
Interventions
default intensification
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 55 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 1, 2017 · Synced Oct 18, 2026, 7:39 PM EDT
Completed Phase 3 Interventional

A Clinical Study to Evaluate the Long-term Safety (12 Months) of the Combination of Aliskiren 300 mg and Hydrochlorothiazide 25 mg

NCT00171405
View directory record Official record
Conditions
Hypertension
Interventions
aliskiren
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 18, 2016 · Synced Oct 18, 2026, 7:39 PM 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 18, 2026, 7:39 PM EDT
Completed Phase 4 Interventional Results available

An Examination of the Blood Pressure Lowering Ability and Safety of Olmesartan Medoxomil in Elderly Patients With Hypertension

NCT00412932
View directory record Official record
Conditions
Hypertension
Interventions
Olmesartan medoxomil, Olmesartan medoxomil/hydrochlorothiazide
Drug
Lead sponsor
Daiichi Sankyo
Industry
Eligibility
65 Years and older
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
29
States / cities
Birmingham, Alabama • Mesa, Arizona • Long Beach, California + 26 more
Source: ClinicalTrials.gov public record
Updated Sep 22, 2009 · Synced Oct 18, 2026, 7:39 PM 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 18, 2026, 7:39 PM EDT
Terminated Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Peripheral Vascular Effects of Sulfhydryl-containing Antihypertensive Pharmacotherapy on Microvessels in Humans

NCT03179163
View directory record Official record
Conditions
Hypertension,Essential
Interventions
Captopril Pill, Enalapril Pill, Hydrochlorothiazide
Drug
Lead sponsor
Penn State University
Other
Eligibility
40 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 28, 2024 · Synced Oct 18, 2026, 7:39 PM EDT