A 55-year-old man attends your general practice after three separate blood pressure readings over 2 months of 158-165/96-100 mmHg in the clinic. He smokes 10 cigarettes/day, has total cholesterol 6.2 mmol/L, HDL 0.9 mmol/L, and no diabetes. His 5-year absolute cardiovascular risk is calculated as 18%. He is otherwise well. What is the most appropriate next step in management?