Obese Hypertension Study (0954-315)

Study Description

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Brief Summary:

This is a 16-week study to evaluate high systolic and diastolic blood pressure following treatment in obese, hypertensive, adult patients.

Condition or disease	Intervention/treatment	Phase
Hypertension	Drug: Comparator: losartan +/- HCTZ; Drug: Comparator: Placebo	Phase 3

Study Design

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Study Type :	Interventional (Clinical Trial)
Actual Enrollment :	261 participants
Allocation:	Randomized
Intervention Model:	Parallel Assignment
Masking:	Double (Participant, Investigator)
Primary Purpose:	Treatment
Official Title:	A Double-Blind, Randomized, Parallel, Efficacy Study Evaluating Losartan Potassium Alone or in Combination With Hydrochlorothiazide Versus Placebo in Obese Patients With Elevated Systolic and Diastolic Blood Pressure
Study Start Date :	February 2006
Actual Primary Completion Date :	February 2007
Actual Study Completion Date :	March 2007

Arms and Interventions

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Arm	Intervention/treatment
Experimental: 1; Losartan	Drug: Comparator: losartan +/- HCTZ; Placebo to losartan once daily for 4 weeks in run-in period. Then, losartan 50 mg for 4 weeks, then titrate to losartan 100 mg at Week 4, then titrate to losartan 100 mg + hydrochlorothiazide (HCTZ) 12.5 mg at Week 8, and finally titrate to losartan 100 mg + HCTZ 25 mg at Week 12. Duration of treatment is approximately 16 weeks.
Placebo Comparator: 2; Placebo	Drug: Comparator: Placebo; Placebo to losartan once daily for 4 weeks in run-in period. Then, placebo to losartan or losartan/HCTZ once daily for approximately 16 weeks.

Outcome Measures

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Primary Outcome Measures :

1. Mean Change From Baseline in Trough Sitting Systolic Blood Pressure (SiSBP) at Week 8 [ Time Frame: At baseline and at 8 weeks (with the measurements taken prior to the morning dose, between 6 AM and 10 AM) ]

   Mean change from baseline in trough (6 hours after last morning dose) SiSBP at Week 8.

   A mixed effects model (with repeated measurements including terms of treatment, investigators, week, baseline SiSBP(/SiDBP), plasma glucose stratum, treatment*week, and week*SiSBP(/SiDBP)) was used to compare the treatments on the change from baseline.

2. Mean Change From Baseline in Trough Sitting Diastolic Blood Pressure (SiDBP) at Week 8 [ Time Frame: At baseline and at 8 weeks (with the measurements taken prior to the morning dose, between 6 AM and 10 AM) ]

   Mean change from baseline in trough (6 hours after the last morning dose) SiDBP at Week 8.

   A mixed effects model (with repeated measurements including terms of treatment, investigators, week, baseline SiSBP(/SiDBP), plasma glucose stratum, treatment*week, and week*SiSBP(/SiDBP)) was used to compare the treatments on the change from baseline.

3. Mean Change From Baseline in Trough Sitting Diastolic Blood Pressure (SiDBP) at Week 12 [ Time Frame: At baseline and at 12 weeks (with the measurements taken prior to the morning dose, between 6 AM and 10 AM) ]

   Mean change from baseline in trough (6 hours after the last morning dose) SiDBP at Week 12.

   A mixed effects model (with repeated measurements including terms of treatment, investigators, week, baseline SiSBP(/SiDBP), plasma glucose stratum, treatment*week, and week*SiSBP(/SiDBP)) was used to compare the treatments on the change from baseline.

4. Mean Change From Baseline in Trough Sitting Systolic Blood Pressure (SiSBP) at Week 12 [ Time Frame: At baseline and at 12 weeks (with the measurements taken prior to the morning dose, between 6 AM and 10 AM) ]

   Mean change from baseline in trough (6 hours after last morning dose) SiSBP at Week 12.

   A mixed effects model (with repeated measurements including terms of treatment, investigators, week, baseline SiSBP(/SiDBP), plasma glucose stratum, treatment*week, and week*SiSBP(/SiDBP)) was used to compare the treatments on the change from baseline.

5. Mean Change From Baseline in Trough Sitting Systolic Blood Pressure (SiSBP) at Week 16 [ Time Frame: At baseline and at 16 weeks (with the measurements taken prior to the morning dose, between 6 AM and 10 AM) ]

   Mean change from baseline in trough (6 hours after last morning dose) SiSBP at Week 16.

   A mixed effects model (with repeated measurements including terms of treatment, investigators, week, baseline SiSBP(/SiDBP), plasma glucose stratum, treatment*week, and week*SiSBP(/SiDBP)) was used to compare the treatments on the change from baseline.

6. Mean Change From Baseline in Trough Sitting Diastolic Blood Pressure (SiDBP) at Week 16 [ Time Frame: At baseline and at 16 weeks (with the measurements taken prior to the morning dose, between 6 AM and 10 AM) ]

   Mean change from baseline in trough (6 hours after the last morning dose) SiDBP at Week 16.

   A mixed effects model (with repeated measurements including terms of treatment, investigators, week, baseline SiSBP(/SiDBP), plasma glucose stratum, treatment*week, and week*SiSBP(/SiDBP)) was used to compare the treatments on the change from baseline.

Eligibility Criteria

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Ages Eligible for Study:	21 Years to 75 Years (Adult, Senior)
Sexes Eligible for Study:	All
Accepts Healthy Volunteers:	No

Criteria

Inclusion Criteria:

• Obese male and female patients, ages 21-75 years, with high blood pressure

Exclusion Criteria:

• Patients cannot have any other severe cardiac conditions

Contacts and Locations

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Sponsors and Collaborators

Merck Sharp & Dohme Corp.

Investigators

Study Director:	Medical Monitor	Merck Sharp & Dohme Corp.

More Information

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Study Description Study Design Arms and Interventions Outcome Measures Eligibility Criteria Contacts and Locations More Information

Additional Information:

MedWatch - FDA maintained medical product safety Information 

Merck: Patient & Caregiver U.S. Product Web Site 

Publications:

Oparil S, Abate N, Chen E, Creager MA, Galet V, Jia G, Julius S, Lerman A, Lyle PA, Pool J, Tershakovec AM. A double-blind, randomized study evaluating losartan potassium monotherapy or in combination with hydrochlorothiazide versus placebo in obese patients with hypertension. Curr Med Res Opin. 2008 Apr;24(4):1101-14. doi: 10.1185/030079908X280716 . Epub 2008 Mar 6.

Responsible Party:	Merck Sharp & Dohme Corp.
ClinicalTrials.gov Identifier:	NCT00289887 History of Changes
Other Study ID Numbers:	0954-315; MK0954-315; 2006_002
First Posted:	February 10, 2006
Results First Posted:	May 27, 2010
Last Update Posted:	July 28, 2015
Last Verified:	July 2015

Additional relevant MeSH terms:

Hypertension; Vascular Diseases; Cardiovascular Diseases; Losartan; Hydrochlorothiazide; Anti-Arrhythmia Agents; Antihypertensive Agents; Angiotensin II Type 1 Receptor Blockers	Angiotensin Receptor Antagonists; Molecular Mechanisms of Pharmacological Action; Diuretics; Natriuretic Agents; Physiological Effects of Drugs; Sodium Chloride Symporter Inhibitors; Membrane Transport Modulators