Study of CS-3150 in Patients With Primary Aldosteronism

Inclusion Criteria: * Male and female subjects aged 20 years or older at informed consent * Patients diagnosed primary aldosteronism by screening test of plasma aldosterone concentration (PAC) and aldosterone to renin ratio (ARR), and confirmatory testing * Patients satisfying following blood pressure; * sitting systolic blood pressure (SBP) ≥ 140 mmHg and \<180 mmHg * sitting diastolic blood pressure (DBP) ≥ 90 mmHg and \<110 mmHg Exclusion Criteria: * Secondary hypertension except primary aldosteronism or hypertensive emergency * Patients diagnosed diabetic nephropathy * Patients with type 1 diabetes * Estimated glomerular filtration rate (eGFR) \< 30 mL/min/1.73m2 * Serum potassium level \< 3.0 or ≥ 5.1 milliequivalent (mEq)/L