Irbesartan/Hydrochlorothiazide National Taiwan University Hospital Listing

A Randomized, Open Label, Cross-over Comparative Study of Irbesartan/Hydrochlorothiazide and Irbesartan in the Treatment of Mild to Moderate Hypertension

Primary:

1. To compare the change in forearm vascular resistance following a 12-week regimen of irbesartan/hydrochlorothiazide versus irbesartan
2. To assess changes of serum proinflammatory cytokine, markers of cardiovascular risks, oxidative stress and circulating adhesion molecule including thiobarbiturate acid reactive substances (TBARS), C-reactive protein (CRP), interleukin 6 (IL-6), and vascular cell adhesion molecule 1 (VCAM-1).

Secondary:

1. To compare the reduction in office blood pressure following a 12-week regimen of irbesartan/hydrochlorothiazide versus irbesartan
2. To compare the response rate (defined as office Systolic blood pressure(SBP)/diastolic blood pressure (DBP) reduce more than 10mmHg from baseline), and BP controlled rate (defined as SBP<140 mmHg and /or DBP<90 mmHg)
3. To ascertain the safety and tolerability of irbesartan / hydrochlorothiazide versus irbesartan when administered once daily
4. To determine whether angiotensin II type 1 (AT-1) receptor gene polymorphisms (including A1166C gene with about 4% of the minor allele frequency in Chinese population and other single nucleotide polymorphisms with a higher frequency of about 10% of minor allele) is related to reduction of BP

Inclusion Criteria:

Patients with mild to moderate hypertension with office diastolic BP (DBP) 90-109 mmHg and/or systolic BP (SBP) 140-179 mmHg before entering each treatment

Exclusion Criteria:

• females: who are pregnant or breast feeding
• office DBP ≧ 110 mmHg or office SBP ≧ 180 mmHg
• history of significant cardiovascular diseases which include: acute myocardial infarction within six months or any ischemic heart disease requiring medication, or cerebrovascular disease
• history of significant renal diseases including: serum creatinine > 3.0 mg/dl, or creatinine clearance < 30 ml/min.
• severe biliary cirrhosis and cholestasis
• refractory hypokalemia, hypercalcemia
• history of autoimmune disease, collagen vascular disease, multiple drug allergies, bronchospastic disease or other malignancies requiring current medication
• hepatic disease as indicated by any of the following : Serum Glutamic Oxaloacetic Transaminase (SGOT) or Serum Glutamic Pyruvate Transaminase (SGPT) >3 x upper limit of normal, or serum bilirubin > 2 x upper limit of normal

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.