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Blood Pressure Lowering of Aliskiren HCTZ Compared to HCTZ in Stage 2 Systolic Hypertension in Older Population (ACTION)

This study has been completed.
Information provided by:
Novartis Identifier:
First received: September 25, 2008
Last updated: March 31, 2011
Last verified: March 2011
The purpose of the study is to evaluate the efficacy and safety of initial use of a fixed dose combination of aliskiren Hydrochlorothiazide (HCTZ) compared to Hydrochlorothiazide in older population with Stage 2 systolic hypertension.

Condition Intervention Phase
Hypertension Drug: Aliskiren Drug: Hydrochlorothiazide Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Official Title: An 8-week Randomized, Double-blind, Parallel-group, Multi-center, Active-controlled Dose Escalation Study to Evaluate the Efficacy and Safety of Aliskiren HCTZ (300/25 mg) Compared to HCTZ (25 mg) in Older Patients With Stage 2 Systolic Hypertension

Resource links provided by NLM:

Further study details as provided by Novartis:

Primary Outcome Measures:
  • Change in Mean Sitting Systolic Blood Pressure (msSBP) From Baseline to Week 4 [ Time Frame: Baseline and Week 4 ]

Secondary Outcome Measures:
  • Change in Mean Sitting Diastolic Blood Pressure (msDBP) From Baseline to Week 4 [ Time Frame: Baseline and Week 4 ]
  • Change in Mean Sitting Systolic Blood Pressure (msSBP) and Mean Sitting Diastolic Blood Pressure (msDBP) (in Patients With msDBP ≥90 mmHg at Baseline) From Baseline to Week 8 [ Time Frame: Baseline and Week 8 ]
  • Percentage of Responders at Week 4 and Week 8 [ Time Frame: At 4 weeks and 8 weeks ]
    Responders defined as mean sitting Systolic Blood Pressure < 140 mmHg or reduction of ≥ 20 mmHg from baseline

  • Percentage of Subjects Achieving Blood Pressure Control at Weeks 4 and 8 [ Time Frame: At Weeks 4 and 8 ]
    Blood pressure control defined as mean sitting Systolic Blood Pressure < 140 mm Hg and mean sitting Diastolic Blood Pressure < 90 mm Hg

Enrollment: 451
Study Start Date: September 2008
Study Completion Date: April 2009
Primary Completion Date: April 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Aliskiren/HCTZ 300/25 mg Drug: Aliskiren
Aliskiren 150 mg for 1 week, Aliskiren 300 mg (with or without amlodipine)for 7 weeks
Active Comparator: HCTZ 25 mg Drug: Hydrochlorothiazide
Hydrochlorothiazide (HCTZ) 12.5 mg for week 1; Hydrochlorothiazide (HCTZ) 25 mg (with or without amlodipine)for 7 weeks


Ages Eligible for Study:   55 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Male or female outpatients, ≥ 55 years old
  2. Patients with essential hypertension
  3. Prior to randomization: Patients must have an office cuff mean sitting Systolic Blood Pressure ≥ 160 mm Hg and < 200 mm Hg
  4. Patients who are eligible and able to participate in the study, and who are willing to give informed consent before any assessment is performed

Exclusion Criteria:

  1. Office blood pressure measured by cuff (msSBP ≥ 200 mm Hg and/or msDBP ≥ 110 mm Hg) at Visits 1-5
  2. History or evidence of a secondary hypertension of any etiology (e.g., uncorrected renal artery stenosis, pheochromocytoma).
  3. History of hypertensive encephalopathy or heart failure (New York Heart Association [NYHA] Class II-IV)
  4. Cerebrovascular accident, transient ischemic cerebral attack (TIA), myocardial infarction, coronary bypass surgery, or any percutaneous coronary intervention (PCI) within 1 year prior to Visit 1
  5. Serum sodium less than the lower limit of normal, serum potassium < 3.5 mEq/L (corresponding to 3.5 mmol/L) or ≥ 5.3 mEq/L (corresponding to 5.3 mmol/L), or dehydration at Visit 1.
  6. 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)
  7. Use of other investigational drugs within 30 days of enrollment.

Other exclusions may apply.

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Please refer to this study by its identifier: NCT00760266

United States, New Jersey
Sites in USA
East Hanover, New Jersey, United States, 07936
Sponsors and Collaborators
  More Information

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: External Affairs, Novartis Identifier: NCT00760266     History of Changes
Other Study ID Numbers: CSPP100A2411
Study First Received: September 25, 2008
Results First Received: December 22, 2010
Last Updated: March 31, 2011

Keywords provided by Novartis:
older population
systolic blood pressure
diastolic blood pressure
amlodipine, stage 2

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases
Antihypertensive Agents
Calcium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Vasodilator Agents
Natriuretic Agents
Physiological Effects of Drugs
Sodium Chloride Symporter Inhibitors processed this record on August 22, 2017