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Effects of Combination Therapy With Alpha-1 Blocker (Bunazosin or Doxazosin) in the Treatment of Patients With Mild to Moderate Essential Hypertension

Effects of Combination Therapy With an α1-blocker (Sustained-release Preparation of Bunazosin or Doxazosin) in Inadequate Responders to an Angiotensin II Antagonist (Valsartan) in the Treatment of Patients With Mild to Moderate Essential Hypertension

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00130156
Enrollment
93
Registered
2005-08-15
Start date
2005-10-31
Completion date
2009-03-31
Last updated
2013-05-14

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

Conditions

High Blood Pressure

Keywords

Blood pressure, SBP, DBP

Brief summary

The purpose of this study is to investigate the efficacy and safety of Bunazosin with Valsartin compared to Doxazosin with Valsartin for patients with mild to moderate essential hypertension accompanied by metabolic syndrome.

Detailed description

This clinical study will comprise a 1 to 2-week washout period, a 5-week mono therapy period with AngiotensinⅡantagonist, and an 8-week alpha blocker add-on treatment period. Total study period will be 15 weeks.

Interventions

DRUGBunazosin

Patients will be randomized to the add-on treatment with Bunazosin (Detantol-R) 3 mg once-daily after breakfast for a total of eight weeks.

DRUGDoxazosin

Patients will be randomized to the add-on treatment with Doxazosin (Doxaben XL) 4 mg once-daily after breakfast for a total of eight weeks.

DRUGValsartin

After wash-out period, the eligible subjects will be treated with Valsartin (Diovan) 80 mg as the mono therapy for 5 weeks. If the blood pressures are inadequately responded, then the patients will be randomized to either Bunazosin (Detantol-R) or Doxazosin (Doxaben XL) along with Valsartin as the add-on treatment for 8 weeks.

Sponsors

Eisai Co., Ltd.
CollaboratorINDUSTRY
Eisai Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
20 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

Subjects with mild to moderate essential hypertension, with the following criteria: 1. Washout period (Week -2) * Male or female subjects aged 20 to 80 years * Systolic blood pressure (SBP):140 mm Hg but \<180 mm Hg and/or diastolic blood pressure (DBP):90 mm Hg but \<110 mm Hg * Subjects who have given written informed consent prior to participation in the trial and who undertake to comply with the protocol 2. Angiotensin II antagonist mono-therapy period (week 0) * Subjects with systolic blood pressure \>= 140 mm Hg but \<180 mm Hg and/or diastolic blood pressure \>= 90 mm Hg but \<110 mm Hg * Presence of any 2 of the following 4 risk factors * Waist circumference: male \> 90 cm, female \> 80 cm * Triglycerides \>= 150 mg/dl * HDL cholesterol: male \< 40 mg/dl, female \< 50 mg/dl * Fasting glucose \>= 110 mg/dl 3. Angiotensin II antagonist with add-on Bunazosin or Doxazosin treatment period (Week 5) * SBP \>=140 mm Hg or decrease \< 10 % OR * DBP \>=90 mm Hg or decrease \< 10 % comparing the blood pressure at the entry of the Angiotensin II antagonist mono-therapy period.

Exclusion criteria

Subjects with the following conditions are not eligible for participation: a) Washout period (Week -1 or -2) * Subjects with severe hypertension (SBP\>=180 mm Hg or DBP\>=110 mm Hg). * Subjects who have proven or suspected hypersensitivity to quinazoline derivatives * Subjects who have a history of alcohol or drug abuse. * Subjects with past or present evidence of cancer * Subjects who have a past history of arterial fibrillation, heart failure (LVEF\<40%), acute coronary syndrome, myocardial infarction, stroke or severe arrhythmia. * Subjects who are severely obese (BMI\>30 kg/m2) * Women who are pregnant or lactating or suspected of being pregnant. * Subjects who have previously participated in any clinical trial of new or unapproved substances within the 12 weeks before starting of washout period * Subjects on other anti-hypertensive or lipid-lowering medication * Inability to return for scheduled visits or comply with any other aspect of the Protocol * Subjects with poorly controlled diabetes mellitus (HbA1c \> 10%) * Subjects with concurrent serious hepatic or renal disorders (defined as AST and/or ALT \> 3 times upper normal limit or Cr \> 2mg/dl). * Subjects who, in the opinion of the investigators, are poor medical candidates or pose any other risk for therapy with an investigational drug.

Design outcomes

Primary

MeasureTime frame
Blood PressureWeek 0, Week 4, Week 9, Week 13.

Secondary

MeasureTime frame
Safety and tolerability.Week 4, Week 9, Week 13.

Countries

Taiwan

Outcome results

None listed

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