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Showing 1–24 of 82 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Hydrochlorothiazide 25 mg Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Food Study of Quinapril HCl and Hydrochlorothiazide Tablets 20 mg/25 mg to Accuretic™ Tablets 20 mg/25 mg

NCT00648011
View directory record Official record
Conditions
Healthy
Interventions
Quinapril HCl and Hydrochlorothiazide Tablets 20 mg/25 mg, Accuretic™ Tablets 20 mg/25 mg
Drug
Lead sponsor
Mylan Pharmaceuticals Inc
Industry
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Apr 23, 2024 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 1 Interventional Results available

Aldosterone and the Metabolic Syndrome

NCT01103245
View directory record Official record
Conditions
Metabolic Diseases, Diabetes Mellitus, Endocrine System Diseases, Glucose Metabolism Disorders
Interventions
Hydrochlorothiazide (HCTZ), Aliskiren 150 mg (ALI 150), Spironolactone (SPL 25), Aliskiren 300 mg (ALI 300), Spironolactone 50 mg (SPL 50)
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 70 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 4, 2018 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 4 Interventional

A Randomized, Double-blind, Placebo Controlled Comparison of Telmisartan Hydrochlorothiazide (HCT) and Valsartan HCT in Hypertension (HTN) Stage I/II Patients

NCT00240448
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
1,109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
100
States / cities
Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 90 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2013 · Synced Sep 9, 2026, 11:15 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 13, 2017 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Fed Study of Benazepril HCl and Hydrochlorothiazide Tablets 20 mg/25 mg to Lotensin HCT® Tablets 20 mg/25 mg

NCT00649038
View directory record Official record
Conditions
Healthy
Interventions
Benazepril HCl and Hydrochlorothiazide Tablets 20 mg/25 mg, Lotensin HCT® Tablets 20 mg/25 mg
Drug
Lead sponsor
Mylan Pharmaceuticals Inc
Industry
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Apr 23, 2024 · Synced Sep 9, 2026, 11:15 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 24, 2017 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Fasting Study of Quinapril HCl and Hydrochlorothiazide Tablets 20 mg/25 mg to Accuretic™ Tablets 20 mg/25 mg

NCT00649441
View directory record Official record
Conditions
Healthy
Interventions
Quinapril HCl and Hydrochlorothiazide Tablets 20 mg/25 mg, Accuretic™ Tablets 20 mg/25 mg
Drug
Lead sponsor
Mylan Pharmaceuticals Inc
Industry
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Apr 23, 2024 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 4 Interventional Results available

Efficacy and Safety of Valsartan/Hydrochlorothiazide Combination Compared to Valsartan Monotherapy or Hydrochlorothiazide Monotherapy in Elderly (>70) With Mild-moderate Hypertension.

NCT00698646
View directory record Official record
Conditions
Hypertension
Interventions
Valsartan + HCTZ, Valsartan, HCTZ
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
70 Years and older
Enrollment
384 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
20
States / cities
Birmingham, Alabama • Phoenix, Arizona • Escondido, California + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 18, 2011 · Synced Sep 9, 2026, 11:15 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 11, 2018 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 1 Interventional

Treatment of Supine Hypertension in Autonomic Failure

NCT00223717
View directory record Official record
Conditions
Hypertension
Interventions
Clonidine, Nitroglycerin transdermal, Dipyridamole/ Aspirin (Aggrenox), Desmopressin (DDAVP), Sildenafil, Nifedipine, Hydralazine, Hydrochlorothiazide, Placebo, Bosentan, Diltiazem, Eplerenone, guanfacine, L-arginine, captopril, carbidopa, losartan, metoprolol tartrate, nebivolol hydrochloride, prazosin hydrochloride, tamsulosin hydrochloride, Head-up tilt., aliskiren, Local heat stress
Drug · Dietary Supplement · Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 80 Years
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 12, 2017 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Moexipril HCL/Hydrochlorothiazide 15/25 mg Tablets Under Fasting Conditions

NCT00835042
View directory record Official record
Conditions
Healthy
Interventions
Moexipril HCl/hydrochlorothiazide 15/25 mg tablets, UNIRETIC® 15/25 mg tablets
Drug
Lead sponsor
Teva Pharmaceuticals USA
Industry
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003
U.S. locations
2
States / cities
Saint Charles, Missouri • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Sep 9, 2026, 11:15 AM 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 15, 2017 · Synced Sep 9, 2026, 11:15 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 21, 2026 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 4 Interventional Results available

Valsartan/Amlodipine As Compared to Losartan Treatment in Stage 2 Systolic Hypertension

NCT00931710
View directory record Official record
Conditions
Stage 2 Systolic Hypertension
Interventions
valsartan, amlodipine, HCTZ, Losartan, HCTZ followed by valsartan, amlodipine, HCTZ
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
488 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Mar 6, 2011 · Synced Sep 9, 2026, 11:15 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 6, 2012 · Synced Sep 9, 2026, 11:15 AM EDT
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 27, 2017 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study to Determine the Effects of Nebivolol and Hydrochlorothiazide in African Americans With Hypertension

NCT00999752
View directory record Official record
Conditions
Hypertension
Interventions
Nebivolol, Hydrochlorothiazide
Drug
Lead sponsor
InVasc Therapeutics, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Tucker, Georgia
Source: ClinicalTrials.gov public record
Updated May 4, 2011 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Fasting Study of Olmesartan Medoxomil and Hydrochlorothiazide Tablets 40 mg/25 mg and Benicar HCT® Tablets 40 mg/25 mg

NCT01020214
View directory record Official record
Conditions
Healthy
Interventions
Olmesartan Medoxomil and Hydrochlorothiazide Tablets 40 mg/25 mg, Benicar HCT® Tablets 40 mg/25 mg
Drug
Lead sponsor
Mylan Pharmaceuticals Inc
Industry
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Apr 22, 2024 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 4 Interventional Results available

Valsartan Intensified Primary Care Reduction of Blood Pressure Study

NCT00902304
View directory record Official record
Conditions
Hypertension
Interventions
Valsartan and hydrochlorothiazide (HCTZ) - monotherapy, Valsartan and amlodipine, Usual care, Valsartan, Valsartan and hydrochlorothiazide (HCTZ) - combination arm
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
2,337 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 3, 2012 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 3 Interventional

Safety/Efficacy of Combo Therapy With Aliskiren & Hydrochlorothiazide vs Therapy With Hydrochlorothiazide Alone in Patients With Hypertension

NCT00387517
View directory record Official record
Conditions
Hypertension
Interventions
Aliskiren/HCTZ
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
726 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 6, 2017 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

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

NCT00778674
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
30 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 22, 2008 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Not applicable Interventional Results available

Series of N-of-1 Crossover Trials of Antihypertensive Therapy in Adolescents With Essential Hypertension

NCT02412761
View directory record Official record
Conditions
Essential Hypertension
Interventions
Lisinopril, Amlodipine, Hydrochlorothiazide
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
9 Years to 22 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 14, 2018 · Synced Sep 9, 2026, 11:15 AM EDT
Terminated Phase 3 Interventional Results available

Avoiding Cardiovascular Events Through Combination Therapy in Patients Living With Systolic Hypertension

NCT00170950
View directory record Official record
Conditions
Hypertension
Interventions
Benazepril/amlodipine 20/5 mg - Dose Level 1 from Day 1 to Month 1, Benazepril/amlodipine 40/5 mg - Dose Level 2 from Month 1 to Month 2, Benazepril/amlodipine 40/10 mg - Dose Level 3 from Month 2 to Month 3 and thereafter, Benazepril/hydrochlorothiazide 20/12.5 mg - Dose Level 1 from Day 1 to Month 1, Benazepril/hydrochlorothiazide 40/12.5 mg - Dose Level 2 from Month 1 to Month 2, Benazepril/hydrochlorothiazide 40/25 mg - Dose Level 3 from Month 2 to Month 3 and thereafter
Drug
Lead sponsor
Novartis
Industry
Eligibility
55 Years and older
Enrollment
11,506 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Oct 23, 2023 · Synced Sep 9, 2026, 11:15 AM EDT
Completed Phase 4 Interventional Results available

Blood Pressure Lowering of Aliskiren HCTZ Compared to HCTZ in Stage 2 Systolic Hypertension in Older Population

NCT00760266
View directory record Official record
Conditions
Hypertension
Interventions
Aliskiren, Hydrochlorothiazide
Drug
Lead sponsor
Novartis
Industry
Eligibility
55 Years and older
Enrollment
451 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 3, 2011 · Synced Sep 9, 2026, 11:15 AM EDT