Inclusion Criteria:

• 18 years of age or older.
• Moderate to severe high blood pressure. This is defined as a systolic pressure (the top number) greater than or equal to 160 mmHg and less than 200 mmHg.

Exclusion Criteria:

• History of allergy or hypersensitivity to ARBs, CCBs, thiazide diuretics
• Inability to stop all prior blood pressure medications safely
• Systolic BP ≥ 200 mmHg and/or diastolic BP ≥ 120 mmHg
• Controlled blood pressure (systolic BP < 140 mmHg) taking more than 3 antihypertensive medications at screening
• Systolic BP ≥ 140 mmHg and < 180 mmHg taking more than two antihypertensive medications at screening
• Systolic BP ≥ 180 mmHg taking more than one antihypertensive medication at screening
• History of stroke, angioplasty, coronary artery bypass graft surgery, heart attack or unstable angina
• Type 1 diabetes
• Poorly controlled Type 2 diabetes
• History of heart failure
• Arrhythmia
• Significant valvular heart disease
• Active gout
• History of autoimmune diseases
• History of multiple drug allergies
• Liver disease
• Pancreatic injury within 1 year of screening
• Evidence of kidney impairment or history of dialysis
• Any surgical or medical condition which might alter the absorption, distribution, metabolism, or excretion of any drug. This could include currently active gastritis, ulcers, or gastrointestinal/rectal bleeding, or urinary tract obstruction.
• Women of child-bearing potential (WOCBP), defined as all women physiologically capable of becoming pregnant, would be excluded UNLESS they are post-menopausal, surgically sterile OR are using acceptable methods of contraception. The use of hormonal contraceptives is not allowed
• Pregnant or nursing (lactating) women
• History of malignancy of any organ system within the past five years
• Any severe, life-threatening disease within the past five years
• History of drug or alcohol abuse within the last 2 years.

Other protocol-defined inclusion/exclusion criteria may apply