Outpatients 18 years of age or older.

Male or female patients are eligible. Female patients must be either post-menopausal for one year or surgically sterile, or using effective, contraceptive methods such as barrier method with spermicide, or an intrauterine device.

Patients with essential hypertension as measured by a validated device

A Study Comparing the Response of Patients With Hypertension to Amlodipine or Amlodipine Plus Benazepril.

What this study is about