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PROBE Parallel 6-week Treatment Comparing Telmisartan/Hydrochlorothiazide (HCT) (40/12.5 or 80/12.5) With Losartan/HCT (50/12.5) Using Ambulatory Blood Pressure Monitoring (ABPM)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00274638
Recruitment Status : Completed
First Posted : January 11, 2006
Last Update Posted : December 9, 2013
Information provided by:
Boehringer Ingelheim

Brief Summary:
To demonstrate that Telmisartan combined with Hydrochlorothiazide (MICARDIS® HCT) is superior to Losartan with Hydrochlorothiazide (Hyzaar®) in lowering blood pressure in mild-moderate hypertensives.

Condition or disease Intervention/treatment Phase
Hypertension Drug: Telmisartan & Hydrochlorothiazide Drug: Losartan & Hydrochlorothiazide Procedure: ABPM Phase 4

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 805 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Prospective, Randomised, Open-Label, Blinded-Endpoint, Parallel Group 6-week Treatment Study Comparing Telmisartan Combined With Hydrochlorothiazide (40 mg/12.5 mg or 80 mg/12.5 mg) Tablets With Losartan Combined With Hydrochlorothiazide (50 mg/12.5 mg) Tablets Using Ambulatory Blood Pressure Monitoring in Patients With Mild-to-Moderate Hypertension
Study Start Date : July 2002
Actual Primary Completion Date : July 2003

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Change from baseline in the last 6-hour mean (relative to dose time) diastolic blood pressure (DBP) as measured by ABPM (Ambulatory Blood Pressure Monitoring) [ Time Frame: after 6 Weeks ]

Secondary Outcome Measures :
  1. Change in the last 6-hour ABPM mean (relative to dosing time) for systolic blood pressure (SBP) [ Time Frame: after 6 weeks ]
  2. Change in the 24-hour ABPM mean (relative to dosing time) for DBP and SBP [ Time Frame: after 6 weeks ]
  3. Change in the ABPM mean DBP and SBP during the morning, daytime, and night-time periods of the 24-hour dosing interval [ Time Frame: after 6 weeks ]
  4. Change in systolic and diastolic blood pressure load during the 24-hour dosing interval of the 24-hour dosing interval [ Time Frame: after 6 weeks ]
  5. Change in mean seated trough DBP and SBP as measured by manual in-clinic cuff sphygmomanometer [ Time Frame: after 6 weeks ]
  6. Responder rates based on both the 24-hour ABPM mean (relative to dose time) blood pressures and the in-clinic trough cuff measurements [ Time Frame: after 6 weeks ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Ability to provide written informed consent in accordance with GCP and local legislation.
  2. Mild-to-moderate hypertension defined as a mean seated DBP of >= 95 mm Hg and <=l to 109 mm Hg, measured by manual cuff sphygmomanometer at Visit 2.
  3. Male or Female >= 18 years.
  4. Ability to stop any current antihypertensive therapy without risk to the patient (investigator's discretion).
  5. 24-hour ABPM mean DBP of >= 85 mm Hg at Visit 3.

Exclusion Criteria:

  1. Pre-menopausal women (last menstruation <= 1 year prior to signing informed consent) who

    • are not surgically sterile, or are
    • nursing, or
    • are of child-bearing potential and are NOT practicing acceptable methods of birth control, or do not plan to continue practicing an acceptable method throughout the study. Acceptable methods of birth control include IUD, oral, implantable or injectable contraceptives. No exception will be made.
  2. Night shift workers who routinely sleep during the daytime and whose work hours include midnight to 4:00 A.M.
  3. Mean seated SBP >= 180 mm Hg or mean seated DBP >= 110 mm Hg during any visit or the placebo run-in phase.
  4. Known or suspected secondary hypertension (i.e. pheochromocytoma).
  5. Hepatic and/or renal dysfunction as defined by the following laboratory parameters: a)SGPT (ALT) or (SGOT) AST less than two times the upper limit of normal range, or b)Serum creatinine greater than 2.3 mg/dL (>203 mico mol/l).
  6. Bilateral renal artery stenosis, renal artery stenosis in a solitary kidney, post-renal transplant patients or patients with only one kidney.
  7. Biliary obstructive disorders.
  8. Clinically relevant sodium depletion, hypokalaemia or hyperkalaemia.
  9. Uncorrected volume depletion.
  10. Primary aldosteronism.
  11. Hereditary fructose intolerance.
  12. Congestive heart failure (NYHA functional class CHF III-IV).
  13. Unstable angina within the past 3 months prior to signing the informed consent form.
  14. Stroke within the past 6 months prior to signing the informed consent form.
  15. Myocardial infarction or cardiac surgery within the past 3 months prior to signing the inform consent form.
  16. PTCA (percutaneous transluminal coronary angioplasty) within the past 3 months prior to signing the informed consent form.
  17. Sustained ventricular tachycardia, atrial fibrillation, atrial flutter or other clinically relevant cardiac arrhythmias as determined by the investigator.
  18. Hypertrophic obstructive cardiomyopathy, aortic stenosis, hemodynamically relevant stenosis of the aortic or mitral valve.
  19. Patients with insulin-dependent diabetes mellitus whose diabetes has not been stable and controlled for at least the past 3 months as defined by an HbA1C >= 10 Percent.
  20. Patients who have previously experienced symptoms characteristic of angioedema during treatment with ACE inhibitors or angiotensin II receptor antagonists.
  21. History of drug or alcohol dependency within 6 months prior to signing the informed consent form.
  22. Chronic administration of any medications known to affect blood pressure, except medication allowed by the protocol.
  23. Any investigational therapy within 1 month of signing the informed consent form.
  24. Known hypersensitivity to any component of the study drugs (placebo, telmisartan, hydrochlorothiazide or losartan).
  25. Any clinical condition which, in the opinion of the investigator would not allow safe completion of the protocol and safe administration of trial medication.
  26. Concomitant use of lithium or cholestyramine or colestipol resins (potential drug interactions with hydrochlorothiazide).
  27. History of non-compliance with prescribed medication.
  28. Inability to comply with protocol.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00274638

Hide Hide 69 study locations
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United States, Alabama
Boehringer Ingelheim Investigational Site
Huntsville, Alabama, United States
United States, Arkansas
Research Solutions, LLC
Little Rock, Arkansas, United States
United States, California
Boehringer Ingelheim Investigational Site
Carmichael, California, United States
Boehringer Ingelheim Investigational Site
Concord, California, United States
Sierra Medical Research
Fresno, California, United States
Attn: Ginger Paselk
Long Beach, California, United States
DeBruin Medical Center
Orangevale, California, United States
Boehringer Ingelheim Investigational Site
Orange, California, United States
Clinical Trials Research
Roseville, California, United States
Dr. R. David Ferrera
Sacramento, California, United States
Westlake Medical Research
Westlake Village, California, United States
United States, Colorado
Rocky Mountain Pulmonary & Critical Care Medicine, Inc.
Wheat Ridge, Colorado, United States
United States, Connecticut
Clinical Research Consultants, Inc.
Trumbull, Connecticut, United States
United States, Delaware
Glasgow Family Pract6ice
Newark, Delaware, United States
United States, Florida
Boehringer Ingelheim Investigational Site
Coral Gables, Florida, United States
Miami Research Associates
Coral Gables, Florida, United States
Patron, Andres, D.O.
Hollywood, Florida, United States
Christopher Chappel, MD
Kissimmee, Florida, United States
Boehringer Ingelheim Investigational Site
Melbourne, Florida, United States
Orlando Clinical Research Center
Orlando, Florida, United States
Attention: Larry I. Gilderman, D.O.
Pembroke Pines, Florida, United States
nTouch Research
St. Petersburg, Florida, United States
Tampa Medical Research Associates
Tampa, Florida, United States
United States, Georgia
Southern Clinical Research and Management, Inc.
Augusta, Georgia, United States
Boehringer Ingelheim Investigational Site
Conyers, Georgia, United States
United States, Idaho
Treasure Valley Cardiology
Boise, Idaho, United States
United States, Illinois
Cedar-Crosse Research Center
Chicago, Illinois, United States
Herron Medical Center, Ltd.
Chicago, Illinois, United States
Protococare Trials, Inc.
Elk Grove Village, Illinois, United States
N Touch Research
Peoria, Illinois, United States
United States, Indiana
Midwest Institute for Clinical Research Inc.
Indianapolis, Indiana, United States
United States, Kansas
Radiant Research
Overland, Kansas, United States
United States, Maryland
Ong Medical Center
Oxon Hill, Maryland, United States
United States, Minnesota
Radiant Research
Edina, Minnesota, United States
Cardiology Research
St. Paul, Minnesota, United States
United States, Missouri
Attention: Mel E. Lucas, DO
Florissant, Missouri, United States
United States, New Mexico
New Mexico Clinical Reaearch & Osteoporosis Center, Inc.
Alburquerque, New Mexico, United States
United States, New York
Syracuse Preventative Cardiology
Syracuse, New York, United States
Great Lakes Medical Research
Westfield, New York, United States
Cardiology and Internal Medicine- Williamsville NY
Williamsville, New York, United States
United States, North Carolina
Comprehensive Clinical Research
Berlin, North Carolina, United States
Bennett Cardiac Center
Charlotte, North Carolina, United States
Charlotte Clinical Research
Charlotte, North Carolina, United States
Boehringer Ingelheim Investigational Site
Raleigh, North Carolina, United States
nTouch Research Corporation
Raleigh, North Carolina, United States
Piedmont Research Associates
Winston Salem, North Carolina, United States
Wake Forest University School of Medicine
Winston Salem, North Carolina, United States
United States, Ohio
Boehringer Ingelheim Investigational Site
Cincinnati, Ohio, United States
Radiant Reseach
Cincinnati, Ohio, United States
Radiant Research
Columbus, Ohio, United States
United States, Oklahoma
Boehringer Ingelheim Investigational Site
Oklahoma City, Oklahoma, United States
Oklahoma City, Oklahoma, United States
Hillcrest Medical Center
Tulsa, Oklahoma, United States
United States, Pennsylvania
Bock Clinical Research
Collegeville, Pennsylvania, United States
Bock Clinical Research
Downingtown, Pennsylvania, United States
Bock Clinical Research
Harleysville, Pennsylvania, United States
The Western Pennsylvania Hospital
Pittsburgh, Pennsylvania, United States
United States, Rhode Island
Omega Research
Warwick, Rhode Island, United States
United States, Tennessee
University of Tennessee Medical Center
Knoxville, Tennessee, United States
Veterans Affairs Medical Center
Memphis, Tennessee, United States
Clinical Research Associates, Inc.
Nashville, Tennessee, United States
United States, Texas
Boehringer Ingelheim Investigational Site
Dallas, Texas, United States
nTouch Research
Houston, Texas, United States
United States, Virginia
Hampton Roads Medical Specialists
Hampton, Virginia, United States
885 Kempsville Road, Suite 221
Norfolk, Virginia, United States
York Clinical Research
Norfolk, Virginia, United States
Boehringer Ingelheim Investigational Site
Richmond, Virginia, United States
United States, Wisconsin
Gemini Scientific
Madison, Wisconsin, United States
University of Wisconsin Medical School
Madison, Wisconsin, United States
Sponsors and Collaborators
Boehringer Ingelheim
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Study Chair: Boehringer Ingelheim Study Coordinator Boehringer Ingelheim

Layout table for additonal information Identifier: NCT00274638    
Other Study ID Numbers: 502.387
First Posted: January 11, 2006    Key Record Dates
Last Update Posted: December 9, 2013
Last Verified: December 2013
Additional relevant MeSH terms:
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Vascular Diseases
Cardiovascular Diseases
Anti-Arrhythmia Agents
Antihypertensive Agents
Angiotensin II Type 1 Receptor Blockers
Angiotensin Receptor Antagonists
Molecular Mechanisms of Pharmacological Action
Natriuretic Agents
Physiological Effects of Drugs
Sodium Chloride Symporter Inhibitors
Membrane Transport Modulators