Blood Pressure Lowering of Aliskiren Hydrochlorothiazide (HCTZ) Versus Amlodipine in Stage 2 Hypertension in African Americans (ATLAAST)

September 20, 2016 updated by: Novartis Pharmaceuticals

An 8 Week Prospective, Multicenter, Randomized, Double-Blind, Active Control, Parallel Group Study to Evaluate the Efficacy and Safety of Aliskiren HCTZ Versus Amlodipine in African American Patients With Stage 2 Hypertension

The purpose of the study is to evaluate the efficacy and safety of a fixed dose combination of aliskiren HCTZ versus amlodipine in African American patients with Stage 2 hypertension.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

332

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New Jersey
      • East Hanover, New Jersey, United States
        • Sites in USA

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients who are eligible and able to participate in the study, and who give written informed consent before any assessment is performed.
  • Men or women 18 years and older of African American background; self identified
  • Patients with stage 2 hypertension. Patients must have a MSSBP ≥ 160 mmHg and < 200 mmHg at Visit 5 (randomization)

Exclusion Criteria:

  • Office blood pressure measured by cuff (MSSBP ≥ 200 mmHg and/or MSDBP ≥ 110 mmHg) at any visit.
  • Use of other investigational drugs at the time of enrollment, or within 30 days or 5 half-lives whichever is longer.
  • History of hypersensitivity to any of the study drugs or to drugs belonging to the same therapeutic class (CCBs or thiazide diuretics) as the study drugs.
  • Long QT syndrome or QTc > 450 msec for males and > 470 msec for females at screening.
  • History of malignancy of any organ system (other than localized basal cell carcinoma of the skin), treated or untreated, within the past 5 years, regardless of whether there is evidence of local recurrence or metastases.
  • Pregnant or nursing (lactating) women, where pregnancy is defined as the state of a female after conception and until the termination of gestation, confirmed by a positive hCG laboratory test (> 5 mIU/mL)

  • Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant. including women whose career, lifestyle, or sexual orientation precludes intercourse with a male partner and women whose partners have been sterilized by vasectomy or other means, UNLESS they are using two birth control methods. The two methods can be a double barrier method or a barrier method plus a hormonal method.

    1. Adequate barrier methods of contraception include: diaphragm, condom (by the partner), intrauterine device (copper or hormonal), sponge or spermicide. Hormonal contraceptives include any marketed contraceptive agent that includes an estrogen and/or a progestational agent. Reliable contraception should be maintained throughout the study and for 7 days after study drug discontinuation.
    2. Women are considered post-menopausal and not of child bearing potential if they have had 12 months of natural (spontaneous) amenorrhea with an appropriate clinical profile (e.g. age appropriate, history of vasomotor symptoms) or six months of spontaneous amenorrhea with serum FSH levels > 40 mIU/mL [and estradiol < 20 pg/mL] or have had surgical bilateral oophorectomy (with or without hysterectomy) at least six weeks ago. In the case of oophorectomy alone, only when the reproductive status of the woman has been confirmed by follow up hormone level assessment.
  • History or evidence of a secondary form of hypertension.
  • Known Keith-Wagener Grade III or IV hypertensive retinopathy.
  • History of cerebrovascular accident, transient ischemic cerebral attack (TIA), heart failure (NYHA Class II-IV), myocardial infarction, coronary bypass surgery, or any percutaneous coronary intervention (PCI) in the last 12 months.
  • Current angina pectoris requiring pharmacological therapy.
  • Other protocol-defined inclusion/exclusion criteria may apply

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Amlodipine
Drug: Amlodipine: 8 weeks
Amlodipine 5 mg for 1 week followed by forced titration to Amlodipine 10 mg for remaining 7 weeks
Experimental: Aliskiren Hydrochlorothiazide (HCTZ)
Drug: Aliskiren Hydrochlorothiazide (HCTZ): 8 weeks
Aliskiren HCTZ (150/12.5 mg) for 1 week followed by forced titration to Aliskiren HCTZ (300/25 mg) for remaining 7 weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Mean Sitting Systolic Blood Pressure (MSSBP) After 8 Weeks of Treatment
Time Frame: Baseline and 8 weeks
To assess the change from baseline in MSSBP after 8 weeks of treatment with an aliskiren HCTZ-based treatment regimen (aliskiren HCTZ 150/12.5 mg, 300/25 mg) versus an amlodipine-based treatment regimen (amlodipine 5 mg, 10 mg) in African American patients with stage 2 hypertension.
Baseline and 8 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Mean Sitting Diastolic Blood Pressure (MSDBP) After 8 Weeks of Treatment
Time Frame: Baseline and 8 weeks
To assess the change from baseline in mean sitting diastolic blood pressure (MSDBP) after 8 weeks of treatment with an aliskiren HCTZ-based treatment regimen (aliskiren HCTZ 150/12.5 mg, 300/25 mg) versus an amlodipine-based treatment regimen (amlodipine 5 mg, 10 mg) in African American patients with stage 2 hypertension.
Baseline and 8 weeks
Change in Mean Sitting Pulse Pressure (MSPP) After 8 Weeks of Treatment
Time Frame: Baseline and 8 weeks
To compare the change from baseline in mean sitting pulse pressure (MSPP) after 8 weeks of treatment with an aliskiren HCTZ-based treatment regimen (aliskiren HCTZ 150/12.5 mg, 300/25 mg) versus an amlodipine-based treatment regimen (amlodipine 5 mg, 10 mg) in African American patients with stage 2 hypertension.
Baseline and 8 weeks
Percentage of Responders After 8 Weeks of Treatment.
Time Frame: 8 weeks
To compare the percentage of responders after 8 weeks of treatment with an aliskiren HCTZ based treatment regimen (aliskiren HCTZ 150/12.5 mg, 300/25 mg) versus an amlodipine-based treatment regimen (amlodipine 5 mg, 10 mg) in African American patients with stage 2 hypertension: [ Responders were defined as patients with MSSBP < 140 mm Hg or a decrease from baseline ≥ 20 mm Hg at 1st response. A response was counted when a patient first achieved MSSBP < 140 mm Hg or a decrease from baseline ≥ 20 mm Hg.]
8 weeks
Percentage of Participants Achieving BP Control After 8 Weeks of Treatment
Time Frame: 8 weeks
To compare the percentage of patients achieving BP control (<140/90 mm Hg) after 8 weeks of treatment with an aliskiren HCTZ-based treatment regimen (aliskiren HCTZ 150/12.5 mg, 300/25 mg) versus an amlodipine-based treatment regimen (amlodipine 5 mg, 10 mg) in African American patients with stage 2 hypertension.
8 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Novartis Pharmaceuticals

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2008

Primary Completion (Actual)

March 1, 2009

Study Completion (Actual)

March 1, 2009

Study Registration Dates

First Submitted

August 21, 2008

First Submitted That Met QC Criteria

August 21, 2008

First Posted (Estimate)

August 22, 2008

Study Record Updates

Last Update Posted (Estimate)

October 27, 2016

Last Update Submitted That Met QC Criteria

September 20, 2016

Last Verified

February 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CSPP100AUS03

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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