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A Study of Nifecardia SRFC and Adalat OROS in the Treatment of Patients With Essential Hypertension

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ClinicalTrials.gov Identifier: NCT00173667
Recruitment Status : Unknown
Verified July 2005 by National Taiwan University Hospital.
Recruitment status was:  Not yet recruiting
First Posted : September 15, 2005
Last Update Posted : December 21, 2005
Information provided by:
National Taiwan University Hospital

Brief Summary:


  • To evaluate the antihypertensive efficacy of two brands of nifedipine 30mg in patients with hypertension.
  • To assess the safety of 8 weeks of therapy with two brands of nifedipine 30mg in patients with hypertension.
  • To study flow-mediated dilatation and oxidative stress in nonsmoker with essential hypertension but without diabetes mellitus or dyslipidemia.

Study Design:

  • Head-to-head, randomized and parallel design.
  • A total of 60 patients with a clinically confirmed diagnosis of hypertension will provide 30 available patients in each treatment group.
  • The drugs and dosage will be as follows:

Group A: nifedipine 30-60mg once daily (Nifecardia, CCPC) Group B: nifedipine 30-60 mg once daily (Adalat OROS, Bayer)


After washout period, the eligible patients will randomly be allocated to receive two brands of nifedipine 30 mg once daily. Each patient will receive two times of ambulatory blood pressure measurement (ABPM) at both entrance and final stages of the study. The patients will also undergo complete clinical evaluation. Therapy dosage will be started at a dose of nifedipine 30 mg once daily. Dosage will be adjusted if systolic blood pressure greater than 140 mmHg or diastolic blood pressure greater than 90 mmHg by office measurement after 4 weeks of treatment. Nifedipine will be increased to 60 mg once daily. The Ambulatory blood pressure measurement will be set to take reading at 1-hour intervals during the 24 hours assessment.

Physical examination included the measurement of heart rate and blood pressure. The value will be read on Visit 1 and 3-12 hours after the last dose of nifedipine. Routine laboratory test includes hematology, blood chemistry and urinalysis. Hematology test and fasting blood chemistry test will be measured immediately before the start of treatment and after 8 weeks' treatment or at time of discontinuation. Thiobarbituric acid-reactive substances (TBARS) in patient plasma were measured for oxidative stress and endothelium-dependent flow-mediated vasodilation will also be evaluated. Possible concomitant medication will remain constant throughout the study. The physician will question the patients as to their compliance at each visit. If compliance dose not reach 80%, the subject will be dropped out.

Condition or disease Intervention/treatment Phase
Hypertension Drug: Nifedipine 30 mg GITS Phase 4

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Study Type : Interventional  (Clinical Trial)
Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Randomized Controlled Study of Nifecardia SRFC (Nifedipine) and Adalat OROS (Nifedipine) in the Treatment of Patients With Essential Hypertension

Resource links provided by the National Library of Medicine

Drug Information available for: Nifedipine

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male or non-pregnant female patients aged 18-70 years.
  • Patients had hypertension with sitting systolic blood pressure 140-180 mmHg, or diastolic blood pressure 90-110 mmHg.
  • Patients must give written informed consent to participate in this study.

Exclusion Criteria:

  • Women who are pregnant or nursing.
  • Patients have the evidence of secondary or malignant hypertension, history of severe heart disease, cerebrovascular accident within one year, or myocardial infarction within six months.
  • Patients receiving more than one anti-hypertensive agents or one antihypertensive agent with maximal recommended dosage before entrance into the trial.
  • Patients with uncontrolled diabetes mellitus.
  • Patients had known hypersensitivity or contraindication to nifedipine, other calcium channel blockers or other beta-adrenergic antagonists.
  • Patients have the evidences of hepatic dysfunction (AST, ALT> 3 times upper limit of normal value), renal dysfunction (serum creatinine concentration>1.5 mg/dl), pulmonary dysfunction, mental disorders or other concurrent severe disease.
  • As to the study of flow-mediated dilatation and oxidative stress, patients with diabetes mellitus, dyslipidemia, body mass index >27, and smokers will be excluded.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00173667

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Cardiovascular Division, Department of Internal Medicine, National Taiwan University Hospital
Taipei, Taiwan
Contact: Gen-Gae Chen, MD    886-2-23123456      
Sponsors and Collaborators
National Taiwan University Hospital
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Principal Investigator: Gen-Gae Chen, MD National Taiwan University Hospital
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ClinicalTrials.gov Identifier: NCT00173667    
Other Study ID Numbers: 182CL1
First Posted: September 15, 2005    Key Record Dates
Last Update Posted: December 21, 2005
Last Verified: July 2005
Additional relevant MeSH terms:
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Essential Hypertension
Vascular Diseases
Cardiovascular Diseases
Calcium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Calcium-Regulating Hormones and Agents
Physiological Effects of Drugs
Vasodilator Agents
Tocolytic Agents
Reproductive Control Agents