A 52-year-old man with no significant past medical history is found on three separate visits to have office blood pressures averaging 152/94 mm Hg. He is otherwise well, BMI 29 kg/m², non-smoker, fasting glucose 5.2 mmol/L, creatinine 85 µmol/L. Home blood pressure monitoring over one week averages 146/92 mm Hg. According to current Canadian guidelines, which is the most appropriate next step in management?