Adalat ® XL® vs Diltiazem on Proteinuria and Blood Pressure in Hypertensive Diabetic Patients

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Adalat ® XL® vs Diltiazem on Proteinuria and Blood Pressure in Hypertensive Diabetic Patients
This study is currently recruiting participants.
Verified by Bayer, December 2008
Sponsored by: Bayer

Information provided by: Bayer
ClinicalTrials.gov Identifier: NCT00713011

Purpose
The study consists of a 12 week run-in period when all subjects are stabilized on a single dose of Avalide (300 mg/12.5 mg or 300mg/25mg dose) per day. After this 12 week run-in ends, subjects will be randomly assigned to start the addition of either Adalat XL or Tiazac XC for 18 weeks of treatment. Subjects will have a 1 in 2 chance of receiving the study drug Adalat XL and a 1 in 2 chance of receiving the drug Tiazac XC. An end of treatment visit will be done 18 weeks after start of study drug. The expected duration of the study is 30 weeks. The purpose of this study is to compare the change in proteinuria, through a urine test, while taking study drug until high blood pressure (BP) is reduced to near normal levels in study subjects with diabetic nephropathy and hypertension.

Condition Intervention Phase
Diabetic Nephropathies
Hypertension
Drug: Adalat XL
Drug: Tiazac XC
Phase III

MedlinePlus related topics: Diabetic Kidney Problems High Blood Pressure Urine and Urination
Drug Information available for: Nifedipine Hydrochlorothiazide Diltiazem Verapamil Dexverapamil Diltiazem hydrochloride Diltiazem malate Verapamil hydrochloride Irbesartan BaseLine
U.S. FDA Resources
Study Type:Interventional
Study Design:Treatment, Randomized, Open Label, Active Control, Parallel Assignment, Safety/Efficacy Study
Official Title:Randomized Open-Label 2-Arm Parallel Design Comparator Study of the Effect of Adalat® XL® Compared to Diltiazem on Proteinuria and Blood Pressure in Patients With Diabetes and Mild to Moderate Hypertension When Used as an Add on to Avalide®

Further study details as provided by Bayer:

Primary Outcome Measures:
Change in Proteinuria [ Time Frame: Baseline/Randomization to Week 18 ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
Percentage of subjects reaching a BP target of 130/80 mmHg at Week 18 [ Time Frame: Baseline/Randomization to Week 18 ] [ Designated as safety issue: No ]

Number and doses of anti-hypertensives used in the 2 treatment arms [ Time Frame: Baseline/Randomization to Week 18 ] [ Designated as safety issue: No ]

Levels of urinary albumin and protein content and estimated glomerular filtration rate (GFR) in the 2 treatment groups [ Time Frame: Baseline/Randomization to Week 18 ] [ Designated as safety issue: No ]

Early BP reduction from randomization achieved with the starting dose in the 2 treatment arms [ Time Frame: Baseline/Randomization to Week 1 ] [ Designated as safety issue: No ]

Adverse Events leading to early withdrawal [ Time Frame: Screening to end of study ] [ Designated as safety issue: Yes ]

All Adverse Events especially, edema [ Time Frame: Screening to end of study ] [ Designated as safety issue: Yes ]

Change in index of glycemia (HbA1c) [ Time Frame: Screening to Week 18 ] [ Designated as safety issue: No ]

Estimated Enrollment:202
Study Start Date:November 2008
Estimated Study Completion Date:December 2009
Estimated Primary Completion Date:December 2009 (Final data collection date for primary outcome measure)

Arms Assigned Interventions
Arm 1: Experimental
N/A Drug: Adalat XL
Patients will receive Avalide (Irbesartan/ hydrochlorothiazide; 300 mg/12.5 mg per day or 300 mg/25.0 mg per day) during the 12 week screening period and during the 18 week treatment period. At baseline, patients will be provided with Adalat XL at a starting dose of 20 or 30 mg. Adalat XL will be titrated during the 18 week treatment period in order to optimize blood pressure. Adalat XL will be supplied in 20 mg, 30 mg, 60 mg, and 90 mg.
Arm 2: Active Comparator
N/A Drug: Tiazac XC
Patients will receive Avalide (Irbesartan/ hydrochlorothiazide; 300 mg/12.5 mg per day or 300 mg/25.0 mg per day) during the 12 week screening period and during the 18 week treatment period. At baseline, patients will be provided with Tiazac XC at a starting dose of 180 mg. Tiazac XC will be titrated during the 18 week treatment period in order to optimize blood pressure. Tiazac XC will be supplied in 180 mg, 240 mg, 300 mg and 360 mg.

Eligibility
Ages Eligible for Study:18 Years to 80 Years
Genders Eligible for Study:Both
Accepts Healthy Volunteers:No
Criteria
Inclusion Criteria:

>/= 18 and < 80 years old.
Diagnosed with hypertension.
Diagnosed with diabetes mellitus type 2 for at least 6 mths prior to entry and on stable medication for diabetes for at 1 mth prior to screening.
Treated on ARB, ACE inhibitor with or without hydrochlorothiazide and suitable to receive combination therapy with Avalide at 300mg/12.5mg per day or 300mg/25mg per day.
Diagnosed with diabetic nephropathy and have proteinuria between 0.8g/day and 5.0g/day at screening and then between 0.8g/day and 3.0g/day at randomization.
Medically appropriate to receive Adalat XL or Tiazac XC.
Exclusion Criteria:

History of alcohol or substance abuse.
Significant CV disorder such as ischemic heart disease, arrhythmias within the last 6 mths, or any history of severe congestive heart failure.
Myocarditis or pericarditis within last 30 day of screening.
ECG showing evidence of major arrhythmia or conduction disturbances requiring treatment with anti-arrhythmic medication.
Females with child-bearing potential or males with a partner of child-bearing potential unless willing to use effective contraception during the study and 3 mths after the end of study.
Females who are pregnant, lactating or planning pregnancy during the study and for 3 mths after the study end.
Known hypersensitivity to Adalat XL or Tiazac XC or other calcium channel blockers of the dihydropyridine class.
Resting heart rate <50 or >110 bpm.
Presence of secondary or malignant hypertension.
DBP >/= 180 and/or SBP >/= 110 mmHg.
Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00713011

Contacts
Contact: Bayer Clinical Trials Contact clinical-trials-contact@bayerhealthcare.com
Contact: For trial location information (Phone Menu Options '3' or '4') (+)1-888-84 22937

Locations
Canada
Not yet recruiting
Quebec, Canada, G1R 2J6
Canada, Alberta
Not yet recruiting
Calgary, Alberta, Canada, T2N 4N1
Not yet recruiting
Edmonton, Alberta, Canada, T6G 2B7
Canada, British Columbia
Not yet recruiting
Vancouver, British Columbia, Canada, V6Z 1Y6
Not yet recruiting
Vancouver, British Columbia, Canada, V6H 2Z6
Canada, Manitoba
Not yet recruiting
Winnipeg, Manitoba, Canada, R3A 1R9
Canada, Nova Scotia
Not yet recruiting
Sydney, Nova Scotia, Canada, B1P 1P3
Canada, Ontario
Not yet recruiting
Oshawa, Ontario, Canada, L1H 1B9
Not yet recruiting
London, Ontario, Canada, N6A 5A5
Recruiting
Kitchener, Ontario, Canada, N2H 5Z8
Not yet recruiting
Toronto, Ontario, Canada, M5C 2T2
Not yet recruiting
Courtice, Ontario, Canada, L1E 3C3
Not yet recruiting
Toronto, Ontario, Canada, M4N 3M5
Not yet recruiting
Thunder Bay, Ontario, Canada, P7E 6E7
Recruiting
Toronto, Ontario, Canada, M4C 5T2
Not yet recruiting
Ottawa, Ontario, Canada, K1H 7W9
Not yet recruiting
Toronto, Ontario, Canada, M3N 1N1
Canada, Quebec
Not yet recruiting
Montreal, Quebec, Canada, H2W 1T8
Not yet recruiting
Montreal, Quebec, Canada, H1T 2M4
Not yet recruiting
Greenfield Park, Quebec, Canada, J4V 2H1
Canada, Saskatchewan
Not yet recruiting
Saskatoon, Saskatchewan, Canada, S7M 2Z1

Sponsors and Collaborators
Bayer
Investigators
Study Director: Bayer Study Director Bayer

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Responsible Party:Bayer Healthcare Pharmaceuticals Canada ( Therapeutic Area Head )
Study ID Numbers:12716, CARDINAL
First Received:July 9, 2008
Last Updated:December 11, 2008
ClinicalTrials.gov Identifier:NCT00713011 [history]
Health Authority:Canada: Health Canada

Keywords provided by Bayer:
Adalat XL
Diltiazem
Tiazac XC
Proteinuria

Study placed in the following topic categories:
Diabetic Nephropathies
Urination Disorders
Diabetes Mellitus
Vascular Diseases
Irbesartan
Endocrine System Diseases
Hydrochlorothiazide
Nifedipine
Calcium, Dietary
Signs and Symptoms
Proteinuria
Verapamil
Urologic Diseases
Diltiazem
Kidney Diseases
Endocrinopathy
Diabetes Complications
Hypertension

Additional relevant MeSH terms:
Vasodilator Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Calcium Channel Blockers
Cardiovascular Agents
Reproductive Control Agents
Antihypertensive Agents
Pharmacologic Actions
Membrane Transport Modulators
Urological Manifestations
Tocolytic Agents
Therapeutic Uses
Cardiovascular Diseases