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A Study of Safety and Efficacy in MK-0954A Combination in Participants With Hypertension (MK-0954A-373 AM3)

An Open-label, Single Arm, Prospective Study to Evaluate the Safety and Anti-hypertensive Efficacy of Losartan 50 mg / Hydrochlorothiazide (HCTZ) 12.5 mg Combination in Patients With Mild to Moderate Essential Hypertension

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01431508
Enrollment
15
Registered
2011-09-09
Start date
2007-08-01
Completion date
2009-06-01
Last updated
2024-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hypertension

Keywords

Hypertension

Brief summary

This study is being conducted to evaluate the safety and antihypertensive efficacy of MK-0954A (Losartan 50 mg / Hydrochlorothiazide (HCTZ) 12.5 mg) in participants with mild to moderate essential hypertension.

Interventions

DRUGLosartan 50 mg / HCTZ 12.5 mg

Losartan 50 mg / HCTZ 12.5 mg tablet once daily for 12 weeks

Sponsors

Organon and Co
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
20 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Participant will have reached the legal age by the time of entrance into the run-in period. * Participant has no active medical problem, other than essential hypertension, which might of itself or by this treatment significantly affect the Participant's blood pressure. \- Participants diagnosed with mild to moderate essential hypertension or hypertension accompanying with established cardiovascular (CV) and renal diseases who are receiving antihypertensive regimen (exclude diuretic), yet not attaining to treatment goal\*. \* Note: For essential hypertension, the goal is to reduce the blood pressure to less than 140/90. For hypertension with established CV and renal diseases, the BP goal is \< 130/80. (According to 2007 European Society of Hypertension (ESH) - European Society of Cardiology (ESC) guideline) * Participant is either receiving antihypertensive therapy or no treatment. * Participants with stable diabetes mellitus may enter the study.

Exclusion criteria

* Pregnant or lactating females. * Secondary hypertension of any etiology (such as unilateral or bilateral renal disease, renal artery stenosis, coarctation of the aorta, pheochromocytoma). * History of malignant hypertension. * Sitting systolic blood pressure \>210 mmHg at Visit 1 (Day 0). * Participants with unresolved cerebrovascular accident or transient ischemic attack in the acute stage at visit 1. * A clinically confirmed myocardial infarction within the recent 3 months. * Angina pectoris. * Clinically important cardiac arrhythmia. * History of unexplained syncope within the prior 2 years, or a known syncopal disorder. \- Presence of hemodynamically significant obstructive valvular disease of cardiomyopathy. * Percutaneous coronary angioplasty or coronary artery bypass surgery within the prior 3 months of visit 1. * Participant with a single functioning kidney.

Design outcomes

Primary

MeasureTime frameDescription
Mean Change From Baseline in Trough Sitting Diastolic Blood Pressure (SiDBP) at Week 12At Baseline and Week 12Participants with SiDBP of 95-115 mmHg at the end of Baseline had SiDBP measured after 12 weeks of treatment.

Participant flow

Participants by arm

ArmCount
Losartan 50 mg / HCTZ 12.5 mg
Participants with mild to moderate essential hypertension who will receive Losartan 50 mg / HCTZ 12.5 mg once-a-day for 12 weeks.
15
Total15

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyLack of Efficacy1
Overall StudyUnable to Follow Protocol Procedures1

Baseline characteristics

CharacteristicLosartan 50 mg / HCTZ 12.5 mg
Age, Continuous50.5 years
STANDARD_DEVIATION 6.7
Sex: Female, Male
Female
6 Participants
Sex: Female, Male
Male
9 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
8 / 15
serious
Total, serious adverse events
0 / 15

Outcome results

Primary

Mean Change From Baseline in Trough Sitting Diastolic Blood Pressure (SiDBP) at Week 12

Participants with SiDBP of 95-115 mmHg at the end of Baseline had SiDBP measured after 12 weeks of treatment.

Time frame: At Baseline and Week 12

Population: Intention-to-Treat

ArmMeasureGroupValue (MEAN)Dispersion
Losartan 50 mg / HCTZ 12.5 mgMean Change From Baseline in Trough Sitting Diastolic Blood Pressure (SiDBP) at Week 12Baseline (N = 15)99.2 mm HgStandard Deviation 5.5
Losartan 50 mg / HCTZ 12.5 mgMean Change From Baseline in Trough Sitting Diastolic Blood Pressure (SiDBP) at Week 12Change from Baseline at Week 12 (N = 13)-12.7 mm HgStandard Deviation 3.2
Comparison: Comparison of Week 12 and Baselinep-value: <0.05t-test, 2 sided

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026