Inclusion Criteria:  Age ≥40 years for men and ≥ 50 years for women who had menopause for 1 year Systolic blood pressure (SBP) ≥140 mmHg and/or diastolic blood pressure (DBP) ≥90 mmHg (average across two visits as detailed in 'Measurements' section below) Adults not currently (in the past month) taking BP medications  Exclusion Criteria:  SBP of ≥180 mmHg, DBP of ≥120 mmHg Creatinine clearance (Cockcroft-Gault Equation) <30 ml/min Serum potassium >5 or <3 mmol/L History of intolerance or allergy to ACEI, ARB, or calcium channel blockers Women who are currently pregnant, or planning to become pregnant Women who are currently breastfeeding Other serious conditions (e.g., those with heart failure treated with medication, COPD patients using Salbutamol etc)