We compared the effects of an Angiotensin II receptor antagonist (ARA) on Plasma Renin and blood pressure (BP) following an oral single dose (sd) and once daily md for seven days to healthy volunteers and patients with essential hypertension (diastolic BP 95 mmHg to 114 mmHg; systolic BP 130 mmHg to 200 mmHg). The gene discussed is REN; the disease is hypertensive disorder.