Study of CS-3150 Compared to Olmesartan in Patients With Essential Hypertension

An Exploratory Study of CS-3150 to Evaluate the Relation Between Antihypertensive Effect and Baseline Factors Compared to Olmesartan Medoxomil in Patients With Essential Hypertension

Phase 3 study to examine the relation between antihypertensive effect and baseline factors exploratively, compared to olmesartan medoxomil in patients with essential hypertension.

Inclusion Criteria:

• Male and female subjects aged 20 years or older at informed consent
• Subjects with essential hypertension during run-in period (mean 24 hour systolic blood pressure SBP ≥ 130 and diastolic blood pressure DBP ≥ 80 mmHg and Sitting systolic blood pressure (SBP) ≥ 140 mmHg and < 180 mmHg, Sitting diastolic blood pressure (DBP) ≥ 90 mmHg and < 110 mmHg)

Exclusion Criteria:

• Secondary hypertension or malignant hypertension
• Diabetes mellitus with albuminuria
• Serum potassium level < 3.5 or ≥ 5.1 milliequivalent (mEq)/L
• Reversed day-night life cycle including overnight workers
• estimated glomerular filtration rate (eGFR) < 60 mL/min/1.73 m^2.